refactor: mv relate subcmd to explore-data

Their UI is similar enough now that it makes sense to put them under the
same subcommand. Also do some source code organizing in a loose attempt
to isolate the CLI rendering things. Update docs.
This is a breaking change, but I'm the only user I know about.

README.md

@@ -94,7 +94,9 @@ $ bin/main draw -output-format=mermaid < testdata/simpsons.ged > /tmp/ged/simpso
 $ bin/main draw -input-format=mermaid < /tmp/ged/simpsons.mermaid > /tmp/ged/simpsons.svg
 ```
 
-### relate
+### explore-data 
+
+#### relate
 
 Calculate relationship between 2 people.
 
@@ -105,5 +107,19 @@ $ ./explore-data.sh relate testdata/kennedy.ged
 
 If you don't have fzf or don't want to use it, specify the IDs of the people like so:
 ```sh
-$ bin/main relate -p1 @I0@ -p2 @I10@ < testdata/kennedy.ged
+$ bin/main explore-data relate -p1 @I0@ -p2 @I10@ < testdata/kennedy.ged
+```
+
+#### show
+
+Display details on a person in a simple group sheet view.
+
+If you have [fzf](https://github.com/junegunn/fzf) on your system, then use fuzzy search to select the people.
+```sh
+$ ./explore-data.sh show testdata/kennedy.ged
+```
+
+If you don't have fzf or don't want to use it, specify the ID of the person like so:
+```sh
+$ bin/main explore-data show -target-id @I10@ < testdata/kennedy.ged
 ```

explore-data.sh

@@ -56,7 +56,7 @@ function relate() {
 		echo "${err_no_fzf}
 
 Example:
-$ bin/main relate -p1 @I0@ -p2 @I10@ < testdata/kennedy.ged" | fold -s >&2
+$ bin/main explore-data relate -p1 @I0@ -p2 @I10@ < testdata/kennedy.ged" | fold -s >&2
 		return 1
 	fi
 
@@ -90,7 +90,7 @@ $ bin/main relate -p1 @I0@ -p2 @I10@ < testdata/kennedy.ged" | fold -s >&2
 	local -r fzf_on_enter='
 	p1=$(echo {+1} | awk "{ print \$1 }")
 	p2=$(echo {+1} | awk "{ print \$2 }")
-	${GED_BIN:?missing GED_BIN} -q relate -p1 "${p1}" -p2 "${p2}" <"${INFILE:?missing INFILE}"'
+	${GED_BIN:?missing GED_BIN} -q explore-data relate -p1 "${p1}" -p2 "${p2}" <"${INFILE:?missing INFILE}"'
 
 	_run_ged parse to-lines < "${infile}" | _run_fzf \
 		--header='Pick 2 people to compare. Press TAB to select/unselect. Press Enter when ready.' \

internal/cmd/cmd.go

@@ -38,7 +38,6 @@ func New() Root {
 		Subs: map[string]alf.Directive{
 			"draw":         makeDraw("draw"),
 			"parse":        makeParse("parse"),
-			"relate":       makeRelate("relate"),
 			"explore-data": makeExploreData("explore-data"),
 		},
 	}