feat(gnoclient): support fetching blocks, block results, latest block number

[leohhhn]

Description

This PR adds gnoclient support for fetching blocks, block results, and the latest block number.

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 76.00000% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 46.41%. Comparing base (fdde3d0) to head (eee2e87).

Files	Patch %	Lines
gno.land/pkg/gnoclient/client_queries.go	76.00%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1910   +/-   ##
=======================================
  Coverage   46.41%   46.41%           
=======================================
  Files         487      487           
  Lines       68973    68998   +25     
=======================================
+ Hits        32011    32026   +15     
- Misses      34313    34318    +5     
- Partials     2649     2654    +5     

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[harry-hov]

please run make fmt!

[zivkovicmilos]

Overall looks good, just left a few comments 🙏

[leohhhn]

Please do not merge - need to finish up the docs for this.