feat(gnoland): Improve gnoland config/secrets command description

[gfanton]

Depends on:

• feat: overhaul gnoland secrets and gnoland config to output JSON #2393

This PR improves the gnoland config get/set and gnoland secrets get commands by adding a description for each subcommand dynamically based on the config tags name and comment.
The first line of the comment will determine the command ShortHelp.
The entire comment will determine the LongHelp.

Demo:

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated
  the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[codecov]

Codecov Report

Attention: Patch coverage is 97.53086% with 2 lines in your changes missing coverage. Please review.

Project coverage is 59.98%. Comparing base (1f58ee4) to head (25b3dc3).
Report is 1 commits behind head on master.

Files	Patch %	Lines
gno.land/cmd/gnoland/config_help.go	96.61%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2399      +/-   ##
==========================================
- Coverage   60.11%   59.98%   -0.14%     
==========================================
  Files         560      561       +1     
  Lines       74911    77412    +2501     
==========================================
+ Hits        45036    46437    +1401     
- Misses      26500    27458     +958     
- Partials     3375     3517     +142     

Flag	Coverage Δ
contribs/gnodev	61.40% <ø> (ø)
contribs/gnofaucet	14.46% <ø> (ø)
gno.land	64.76% <97.53%> (+0.58%)	⬆️
gnovm	64.13% <ø> (ø)
misc/genstd	80.54% <ø> (ø)
misc/logos	19.88% <ø> (ø)
tm2	62.04% <ø> (+0.07%)	⬆️

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[zivkovicmilos]

@moul @thehowl this is too cool

[zivkovicmilos]

Amazing 👏

[leohhhn]

Nice, looks cool!