Update zsh completion scripts

[benknoble]

I updated or added the completion code for the commands I use (since those were the ones I could best evaluated).

Further notes:

• I tried to keep each patch small, so the aggregate may look large but should be reviewable in pieces.
• I didn't update raco's checksum because I have non-standard tools installed that would change the correct checksum.
• For extremely simple completions, the following Vim macro can turn the help text (two lines of --arg and description) into an _arguments argument (depends on surround; provides a decent starting point for many complex completions):

  yypkyssbyss'Jxjyss]yss'kJxj
  

• I'm willing to drop the (almost tip) commit 7d05838 (todo: note a problem with top-level collections, 2024-11-26), but I noticed a problem and don't have a good suggestion (yet) on how to fix it. I figured I'd share the information I learned while playing with the code.

Suggestions for improvement welcome, particularly to remove almost-but-not-quite-duplicate code or the post-processing on raco pkg show output.

[benknoble]

Fixed a show-stopping bug with raco make completion:

range-diff:

 1:  db5d8f7 !  1:  1d2e4bc zsh: update raco make completion
    @@ racket-completion.zsh: _raco_cmd_exe() {
      _raco_cmd_make() {
        _arguments "$RACKET_COMMON[@]" \
     -    '(-j)'-j'+[Use N parallel jobs]:cores: ' \
    -+    '*'-l'[Compile path as a collection-based module path]:path:->libfile'
    ++    '*'-l'[Compile path as a collection-based module path]:path:->libfile' \
     +    '(-j)'-j'[Use N parallel jobs]:cores: ' \
          '(--disable-inline)'--disable-inline'[Disable procedure inlining during compilation]' \
          '(--disable-constant)'--disable-constant'[Disable enforcement of module constants]' \
 2:  5284ac9 =  2:  f31919f zsh: update raco distribute completion
 3:  dc88c19 =  3:  53a2c7d zsh: update raco expand completion
 4:  95b3fce =  4:  5497abc zsh: update raco test completion
 5:  94f90af =  5:  e898705 zsh: update racket completion
 6:  4e120b8 =  6:  91b0862 zsh: add raco pkg completion
 7:  8e685cd =  7:  cf8517c zsh: add raco pkg install completion
 8:  1901d39 =  8:  4444b14 zsh: add raco pkg update completion
 9:  113a343 =  9:  e516c11 zsh: add raco pkg uninstall completion
10:  6eaeb44 = 10:  06a8ec6 zsh: complete installed packages in some commands
11:  07c6028 = 11:  65c247e zsh: add raco pkg new completion
12:  7149971 = 12:  5c3823b zsh: add raco pkg show completion
13:  db1ffc2 = 13:  3c1e766 zsh: add raco pkg migrate completion
14:  0d7fe0d = 14:  4ebf9b3 fix unused variables/imports in main program
15:  7d05838 = 15:  f455417 todo: note a problem with top-level collections
16:  697cd65 = 16:  b315c8d zsh: complete migratable versions in raco pkg migrate