Fix creation of configdir in prehook

[sarcasticadmin]

Description

Related to: #432

While running go test -v ./... I noticed that the config dir ~/.config/pat was being created in my development
environment. I would not expect running tests to result create extra dirs within $XDG_CONFIG_HOME. This was use to the
init() function within prehooks.

I opted to moved the prehooks dir setup into main.go which aligns with the rest of the config setup so running the test
suite no longer results in an additional dir being created in $XDG_CONFIG_HOME.

Tests

I dont have a good way to ensure that the prehook functionality still works a intended. I can confirm that the
script gets found and executed on my shack PC:

Create the prehook:

mkdir ~/.config/path/prehooks
cat << EOF > ~/.config/pat/prehooks/my-prehook.sh
#!/bin/sh
echo "hello from prehook\r"
EOF
chmod +x ~/.config/pat/prehooks/my-prehook.sh

Attempt to connect to a gateway and call prehook:

# pat connect 'ax25:///WA6BGS-10?prehook=my-prehook.sh'
2024/04/15 18:51:35 Connecting to WA6BGS-10 (ax25+linux)...
2024/04/15 18:51:36 Running prehook...
2024/04/15 18:51:36 Prehook succeeded
2024/04/15 18:51:36 Connected to WA6BGS-10 (AX.25)
WA6BGS-10 - Linux RMS Gateway 2.5.1 Feb 16 2024 (DM12mr)

WA6BGS-10 Linux RMS Gateway 2.5.1, El Cajon, CA

INFO: Host Name cms.winlink.org, Port 8772
Connected
[WL2K-5.0-B2FWIHJM$]
;PQ: 25298039
CMS via WA6BGS-10 >
>FF
Login [963]:
2024/04/15 18:51:44 Exchange failed: Unexpected response: 'Login [963]:'

Im assuming that the Unexpected response was becuase I just echoed a random string. It also seems that
any output is getting gobbled up by the existing connection since I dont see the "hello from prehook" text.

Go tests are all still passing:

$ go test -v ./...
?       github.com/la5nta/pat/cfg       [no test files]
?       github.com/la5nta/pat/internal/buildinfo        [no test files]
?       github.com/la5nta/pat/internal/debug    [no test files]
?       github.com/la5nta/pat/internal/cmsapi   [no test files]
?       github.com/la5nta/pat/internal/directories      [no test files]
?       github.com/la5nta/pat/internal/gpsd     [no test files]
?       github.com/la5nta/pat/internal/osutil   [no test files]
?       github.com/la5nta/pat/internal/prehook  [no test files]
=== RUN   TestReadRigsFromEnv
=== RUN   TestReadRigsFromEnv/simple
=== RUN   TestReadRigsFromEnv/with_VFO
=== RUN   TestReadRigsFromEnv/full
--- PASS: TestReadRigsFromEnv (0.00s)
    --- PASS: TestReadRigsFromEnv/simple (0.00s)
    --- PASS: TestReadRigsFromEnv/with_VFO (0.00s)
    --- PASS: TestReadRigsFromEnv/full (0.00s)
=== RUN   Test_toURL
=== RUN   Test_toURL/ax25_1200
=== RUN   Test_toURL/ax25_9600
=== RUN   Test_toURL/adrop_2000
=== RUN   Test_toURL/adrop_500
=== RUN   Test_toURL/adrop_1000
=== RUN   Test_toURL/adrop_unspec
=== RUN   Test_toURL/pactor
=== RUN   Test_toURL/robust_packet
=== RUN   Test_toURL/vara_hf_500
=== RUN   Test_toURL/vara_hf_unspec
=== RUN   Test_toURL/vara_hf_2750
=== RUN   Test_toURL/vara_fm_narrow
=== RUN   Test_toURL/vara_fm_wide
--- PASS: Test_toURL (0.00s)
    --- PASS: Test_toURL/ax25_1200 (0.00s)
    --- PASS: Test_toURL/ax25_9600 (0.00s)
    --- PASS: Test_toURL/adrop_2000 (0.00s)
    --- PASS: Test_toURL/adrop_500 (0.00s)
    --- PASS: Test_toURL/adrop_1000 (0.00s)
    --- PASS: Test_toURL/adrop_unspec (0.00s)
    --- PASS: Test_toURL/pactor (0.00s)
    --- PASS: Test_toURL/robust_packet (0.00s)
    --- PASS: Test_toURL/vara_hf_500 (0.00s)
    --- PASS: Test_toURL/vara_hf_unspec (0.00s)
    --- PASS: Test_toURL/vara_hf_2750 (0.00s)
    --- PASS: Test_toURL/vara_fm_narrow (0.00s)
    --- PASS: Test_toURL/vara_fm_wide (0.00s)
PASS
ok      github.com/la5nta/pat   0.004s
=== RUN   TestInsertionTagReplacer
=== RUN   TestInsertionTagReplacer/<Callsign>
=== RUN   TestInsertionTagReplacer/<Date>
=== RUN   TestInsertionTagReplacer/<UDate>
=== RUN   TestInsertionTagReplacer/<Time>
=== RUN   TestInsertionTagReplacer/<UTime>
=== RUN   TestInsertionTagReplacer/<GPS_DECIMAL>
=== RUN   TestInsertionTagReplacer/<GPSLatitude>
=== RUN   TestInsertionTagReplacer/<GPSLongitude>
=== RUN   TestInsertionTagReplacer/<Latitude>
=== RUN   TestInsertionTagReplacer/<ProgramVersion>
=== RUN   TestInsertionTagReplacer/<MsgSender>
=== RUN   TestInsertionTagReplacer/<DateTime>
=== RUN   TestInsertionTagReplacer/<UDateTime>
=== RUN   TestInsertionTagReplacer/<GPS>
=== RUN   TestInsertionTagReplacer/<GPS_SIGNED_DECIMAL>
=== RUN   TestInsertionTagReplacer/<UDTG>
=== RUN   TestInsertionTagReplacer/<Day>
=== RUN   TestInsertionTagReplacer/<UDay>
=== RUN   TestInsertionTagReplacer/<GridSquare>
=== RUN   TestInsertionTagReplacer/<Longitude>
=== RUN   TestInsertionTagReplacer/<GPSValid>
--- PASS: TestInsertionTagReplacer (0.00s)
    --- PASS: TestInsertionTagReplacer/<Callsign> (0.00s)
    --- PASS: TestInsertionTagReplacer/<Date> (0.00s)
    --- PASS: TestInsertionTagReplacer/<UDate> (0.00s)
    --- PASS: TestInsertionTagReplacer/<Time> (0.00s)
    --- PASS: TestInsertionTagReplacer/<UTime> (0.00s)
    --- PASS: TestInsertionTagReplacer/<GPS_DECIMAL> (0.00s)
    --- PASS: TestInsertionTagReplacer/<GPSLatitude> (0.00s)
    --- PASS: TestInsertionTagReplacer/<GPSLongitude> (0.00s)
    --- PASS: TestInsertionTagReplacer/<Latitude> (0.00s)
    --- PASS: TestInsertionTagReplacer/<ProgramVersion> (0.00s)
    --- PASS: TestInsertionTagReplacer/<MsgSender> (0.00s)
    --- PASS: TestInsertionTagReplacer/<DateTime> (0.00s)
    --- PASS: TestInsertionTagReplacer/<UDateTime> (0.00s)
    --- PASS: TestInsertionTagReplacer/<GPS> (0.00s)
    --- PASS: TestInsertionTagReplacer/<GPS_SIGNED_DECIMAL> (0.00s)
    --- PASS: TestInsertionTagReplacer/<UDTG> (0.00s)
    --- PASS: TestInsertionTagReplacer/<Day> (0.00s)
    --- PASS: TestInsertionTagReplacer/<UDay> (0.00s)
    --- PASS: TestInsertionTagReplacer/<GridSquare> (0.00s)
    --- PASS: TestInsertionTagReplacer/<Longitude> (0.00s)
    --- PASS: TestInsertionTagReplacer/<GPSValid> (0.00s)
=== RUN   TestBuildXML
--- PASS: TestBuildXML (0.00s)
=== RUN   TestDateFormat
--- PASS: TestDateFormat (0.00s)
=== RUN   TestPlaceholderReplacer
=== RUN   TestPlaceholderReplacer/0
=== RUN   TestPlaceholderReplacer/1
=== RUN   TestPlaceholderReplacer/2
=== RUN   TestPlaceholderReplacer/3
--- PASS: TestPlaceholderReplacer (0.00s)
    --- PASS: TestPlaceholderReplacer/0 (0.00s)
    --- PASS: TestPlaceholderReplacer/1 (0.00s)
    --- PASS: TestPlaceholderReplacer/2 (0.00s)
    --- PASS: TestPlaceholderReplacer/3 (0.00s)
=== RUN   TestReplaceSelect
=== RUN   TestReplaceSelect/0
=== RUN   TestReplaceSelect/1
=== RUN   TestReplaceSelect/2
--- PASS: TestReplaceSelect (0.00s)
    --- PASS: TestReplaceSelect/0 (0.00s)
    --- PASS: TestReplaceSelect/1 (0.00s)
    --- PASS: TestReplaceSelect/2 (0.00s)
PASS
ok      github.com/la5nta/pat/internal/forms    0.006s