feat(examples): add disperse (v2)

[agherasie]

This PR adds a gno version of the disperse ethereum app to gno.land !
Another attempt was made in #1414 but we have decided to pick up from @leohhhn 's work with @lennyvong and made this PR, tested using txtar tests to avoid the situation described in #2595
There is also an older (but functional for the most part) version deployed in test4 with a linked webapp

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 60.22%. Comparing base (04d5239) to head (eb1dc54).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2613      +/-   ##
==========================================
- Coverage   60.23%   60.22%   -0.01%     
==========================================
  Files         562      562              
  Lines       75091    75091              
==========================================
- Hits        45230    45223       -7     
- Misses      26481    26486       +5     
- Partials     3380     3382       +2     

Flag	Coverage Δ
contribs/gnodev	60.58% <ø> (-0.82%)	⬇️
contribs/gnofaucet	14.46% <ø> (-0.86%)	⬇️
gno.land	64.76% <ø> (ø)
gnovm	64.33% <ø> (ø)
misc/genstd	80.54% <ø> (ø)
misc/logos	19.88% <ø> (ø)
tm2	62.03% <ø> (-0.02%)	⬇️

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[agherasie]

LGTM. Thanks for continuing this!

Left some comments to be addressed before we can go ahead with the merge 💯

@leohhhn I've addressed all of your comments and sent the relevant commits in replies except a few ones which were split across several commits

[leohhhn]

Hey @agherasie, I left some more comments that should be addressed, but the gist is there.