feat(gnodev): add balances & keybase support

[gfanton]

Address #1935

This PR brings significant enhancements to gnodev. It adds features like customizing user balances, loading keybases, and specifying realm paths with query-like options. Here are the key changes:

1. Customized Balances: Users can now set balances, load them from a file, or create temporary users for better fund management.
2. Keybase Loading: gnodev now loads the user's home Keybase by default, providing premine for listed keys.
3. Additional Accounts: Introduces the -add-account flag to add accounts easily in the format <account>[=<amount>]. The amount is optional and corresponds to the initial balance the user will have.
4. Realm Path Options: Users can now load realms with specific creators and deposits using query-like paths: gnodev ./myrealm?creator=foo&deposit=42ugnot

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

Attention: Patch coverage is 75.30864% with 20 lines in your changes are missing coverage. Please review.

Project coverage is 48.23%. Comparing base (b2f12a9) to head (55b863f).
Report is 1 commits behind head on master.

Files	Patch %	Lines
gno.land/pkg/gnoland/balance.go	70.58%	18 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1938      +/-   ##
==========================================
- Coverage   48.25%   48.23%   -0.02%     
==========================================
  Files         408      409       +1     
  Lines       62338    62349      +11     
==========================================
- Hits        30081    30076       -5     
- Misses      29749    29765      +16     
  Partials     2508     2508              

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[leohhhn]

Reviewed the docs, left some comments. Thanks 🙏

[zivkovicmilos]

Looks good 💯

And works even better 👏

Super stoked for this feature, it's the one thing keeping me from switching to gnodev full time (well, also tx predeploying)

[zivkovicmilos]

@gfanton the CI is going bananas, please check it when you merge in master

[gfanton]

@zivkovicmilos @leohhhn had to update some parts of the code related to Keybase because I had some misconceptions about how it was working. I've created a new package dedicated to storing address keys along with their names.
It should be good now, but it may need a second pass on it.