feat(gnorkle): improve README, add proof of ownership system

[leohhhn]

WIP; related to gnolang/hackerspace#91

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 60.88%. Comparing base (5503cca) to head (11c5f49).
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2822      +/-   ##
==========================================
+ Coverage   60.83%   60.88%   +0.04%     
==========================================
  Files         563      563              
  Lines       75193    75235      +42     
==========================================
+ Hits        45743    45804      +61     
+ Misses      26076    26065      -11     
+ Partials     3374     3366       -8     

Flag	Coverage Δ
contribs/gnodev	61.46% <ø> (ø)
contribs/gnofaucet	14.46% <ø> (ø)
gnovm	65.63% <ø> (ø)
misc/genstd	80.54% <ø> (ø)
misc/logos	20.23% <ø> (ø)
tm2	62.07% <ø> (+0.18%)	⬆️

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