feat: add the ability to add packages to genesis transactions

[zivkovicmilos]

Description

This PR introduces the ability to specify a package directory that will recursively be added (deployed) to the genesis.json, utilizing the existing gnoland genesis txs add command.

It also separates out the logic from gnoland genesis txs add into:

• gnoland genesis txs add sheets for individual tx sheet files (ex. from tx-archive output)
• gnoland genesis txs add packages for recursively adding packages (ex. examples)

Related:

• [chain] move gnoland start's genesis generation to cmd/genesis #1952
• feat: implement txs generate and txs clear command #1988

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.

[ajnavarro]

LGTM, the only thing I would do is to separate the functionality into two different commands. That will allow us in the future to add more functionality to them related to sheets or packages without needing to fiddle around with functionality that is not fully related.

[zivkovicmilos]

@r3v4s @adr-sk
We should probably incorporate this logic into the validator docs, as the initial examples folder should be preloaded 🙏

[ajnavarro]

Small nit to avoid a panic, apart from that, LGTM.

[codecov]

Codecov Report

Attention: Patch coverage is 82.10526% with 17 lines in your changes missing coverage. Please review.

Project coverage is 54.62%. Comparing base (5541e35) to head (fb25fc1).

Files	Patch %	Lines
gno.land/cmd/gnoland/genesis_txs_add_packages.go	81.81%	3 Missing and 3 partials ⚠️
gno.land/cmd/gnoland/genesis_txs_add_sheet.go	84.21%	3 Missing and 3 partials ⚠️
gno.land/cmd/gnoland/genesis_txs.go	81.81%	1 Missing and 1 partial ⚠️
gno.land/pkg/gnoland/genesis.go	0.00%	2 Missing ⚠️
gno.land/pkg/integration/testing_node.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2327      +/-   ##
==========================================
+ Coverage   54.60%   54.62%   +0.01%     
==========================================
  Files         579      581       +2     
  Lines       77899    77952      +53     
==========================================
+ Hits        42539    42582      +43     
- Misses      32191    32196       +5     
- Partials     3169     3174       +5     

Flag	Coverage Δ
gno.land	61.89% <82.10%> (+0.24%)	⬆️

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