feat(examples): Implement p/demo/bitmap

[linhpn99]

Description

From issue : https://github.com/gnolang/gno/issues/2119

A simple implementation of bitmap in p/demo/bitmap :

• Logic code
• Test cases

Contributors' checklist...

• [x] 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
• [x] 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.

[linhpn99]

@zivkovicmilos @leohhhn what do you think about this utility ?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 60.21%. Comparing base (65ee7a5) to head (94834d1).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2115      +/-   ##
==========================================
- Coverage   60.24%   60.21%   -0.03%     
==========================================
  Files         562      562              
  Lines       75031    75031              
==========================================
- Hits        45200    45183      -17     
- Misses      26458    26473      +15     
- Partials     3373     3375       +2     

Flag	Coverage Δ
contribs/gnodev	61.40% <ø> (ø)
contribs/gnofaucet	14.46% <ø> (-0.86%)	:arrow_down:
misc/genstd	80.54% <ø> (ø)
misc/logos	19.88% <ø> (ø)
tm2	62.05% <ø> (-0.05%)	:arrow_down:

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:loudspeaker: Thoughts on this report? Let us know!

[github-actions[bot]]

This PR is stale because it has been open 3 months with no activity. Remove stale label or comment or this will be closed in 3 months.

[Gno2D2]

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[thehowl]

I'm closing this PR as the author has not been contributing to Gno for a while.

Feel free to re-open this PR, or fork this PR and propose a new one, considering the latest comments and any surrounding discussion.