chore: add Go code generation for IDL

[lumtis]

Generate Go code used in node for the programs IDL.

There are limitation right now as for example not all fields of the IDL are generated.

The current idea will first be for node to import the package in this repo so it can be visualized what version is tied to the current code in ZetaClient and prevent interface breaking

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 1.09%. Comparing base (0d24a71) to head (0384ef0).

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #52   +/-   ##
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  Coverage   1.09%   1.09%           
=====================================
  Files          1       1           
  Lines        456     456           
=====================================
  Hits           5       5           
  Misses       451     451           

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[skosito]

@lumtis i renamed a module (it was missing zeta-chain) and generated latest gateway.go, started integrating with this PR (not yet complete): zeta-chain/node#2984

[skosito]

@lumtis i think we can merge this because we use Discriminators generated from here, and now we are adding execute and execute_spl functions, so discriminators should be available for zetaclient

we can find a better way to generate go bindings, but as tmp solution this seems fine

[lumtis]

@lumtis i think we can merge this because we use Discriminators generated from here, and now we are adding execute and execute_spl functions, so discriminators should be available for zetaclient

we can find a better way to generate go bindings, but as tmp solution this seems fine

Sounds good