Suggestion: merge choose-menu and choose-option into choose

[balupton]

choose-menu returns indexes, choose-option supports filters. They should be the same command now, which would offer a better experience around timeouts and filters. The different functionality should just be via a choose --index option or so.

[balupton]

So this was done during my trip to Bali in April, and I'm now fixing up the tests. Updates were posted to the discord server.

One issue is that I removed filter functionality in favour of a new --default-fuzzy= option, however that causes echo-checksum --algorithm=sha to fail currently as it does not support multiple defaults with the default --no-multi behaviour.

As such, after some prototyping and discussion with @molleweide I'll go with the last option in this brainstorm below, which introduces the idea of preferences:

Which ones?
   ▣ a
   ▣ aa
>  ▣ aaa
   □ b
SELECT [SPACE]   CONFIRM [ENTER] [E]   CANCEL [ESC] [Q]   UP [↑] [W] [K]   DOWN [↓] [S] [J]   FIRST [HOME] [A]   LAST [END] [D]   ALL/NONE [T]
4 ITEMS, 4 SELECTED, 3 PREFERENCES | NEXT [A]   PRIOR [D]   RESET [Z]   NONE [T]

Which one?
>  ◉ a
   ☉ aa
   ○ b
   ○ b
   ○ b
   ○ b
   ☉ aaa
   ○ b
SELECT [SPACE] [ENTER] [E]   CANCEL [ESC] [Q]   UP  [↑] [W] [K]   DOWN [↓] [S] [J]   FIRST [HOME] [A]   LAST [END] [D]   SEARCH [/]
9 ITEMS, 1 SELECTED, 3 PREFERENCES, 5 CONCEALED | NEXT [A]   PRIOR [D]   RESET [Z]   ALL/NONE [T]
/ SEARCHING FOR: > sha


Which one?
   [ 5 items above ]
>  ◉ a
   ☉ aa
   ○ b
   ○ b
   ○ b
   ○ b
   ☉ aaa
   ○ b
   [ 1 item below ]
SELECT [SPACE] [ENTER] [E]   CANCEL [ESC] [Q]   UP  [↑] [W] [K]   DOWN [↓] [S] [J]   FIRST [HOME] [A]   LAST [END] [D]   NEXT [A]   PRIOR [D]   RESET [Z]