feat: add p/sys/boot + codegen system for contracts

[moul]

• add p/sys/boot
• import p/sys/boot in other contracts
• add codegen system
• setup codegen data in gnodev
• setup codegen data in gno test
• setup codegen data in gnoland start --lazy

[codecov]

Codecov Report

Attention: Patch coverage is 58.33333% with 15 lines in your changes missing coverage. Please review.

Project coverage is 54.72%. Comparing base (88a417b) to head (e11a31e).
Report is 3 commits behind head on master.

Files	Patch %	Lines
gno.land/pkg/integration/testing_node.go	0.00%	7 Missing ⚠️
gno.land/pkg/gnoland/genesis.go	60.00%	5 Missing and 1 partial ⚠️
gno.land/pkg/keyscli/run.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2488      +/-   ##
==========================================
+ Coverage   54.69%   54.72%   +0.02%     
==========================================
  Files         590      590              
  Lines       79036    79041       +5     
==========================================
+ Hits        43230    43253      +23     
+ Misses      32554    32536      -18     
  Partials     3252     3252              

Flag	Coverage Δ
contribs/gnofaucet	14.46% <ø> (-0.86%)	⬇️
contribs/gnokeykc	0.00% <ø> (ø)
contribs/gnomd	0.00% <ø> (ø)
gno.land	62.98% <58.33%> (+0.30%)	⬆️

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