feat: gnobro, a terminal-based realm browser

[gfanton]

This PR introduces gnobro, a terminal-based browser to explore realms and enhance the user development experience on gnodev.

TODO

• minimal documentation
• Add tests somehow

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

All modified and coverable lines are covered by tests ✅

Project coverage is 60.20%. Comparing base (e60e4ca) to head (3ad927c).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2608      +/-   ##
==========================================
- Coverage   60.21%   60.20%   -0.01%     
==========================================
  Files         562      562              
  Lines       75026    75007      -19     
==========================================
- Hits        45177    45160      -17     
  Misses      26475    26475              
+ Partials     3374     3372       -2     

Flag	Coverage Δ
contribs/gnodev	61.40% <100.00%> (+0.81%)	⬆️
contribs/gnofaucet	14.46% <ø> (ø)
gno.land	64.46% <100.00%> (-0.15%)	⬇️
gnovm	64.33% <ø> (ø)
misc/genstd	80.54% <ø> (ø)
misc/logos	19.88% <ø> (-0.36%)	⬇️
tm2	61.97% <ø> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[deelawn]

This is awesome 🥇 You've inspired me to use charm in a future project. I left a few comments and questions but nothing too serious.

[kroppacat]

Hello Gnomes!