Adding tokenfactory denom metadata endpoint

[dssei]

Describe your changes and provide context

When we create tokens using token factory, denoms are created in the factory/{owner_walltet_id}/{denom} format
E.g. factory/sei1gxskuzvhr4s8sdm2rpruaf7yx2dnmjn0zfdu9q/NEWCOIN

When querying metadata via /cosmos/bank/v1beta1/denoms_metadata/{denom} endpoint for such a denom we are getting error like

{
    "code": 12,
    "message": "Not Implemented",
    "details": []
}

This happens, because routing logic splits the denom uri param into 3 components rather then one and hence tries to router request to a non-existing handler. Url encoding does not help either as it still results in same issue. We would like to add additional endpoint to handle token factory created metadata retrieval, and move denom for the endpoint from uri param to query param.

so then for token factory created tokens the query would be
/sei-protocol/seichain/tokenfactory/denoms/metadata?denom=factory/{owner_walltet_id}/{denom}

Testing performed to validate your change

• Functional testing on local node with updated source
• unit/integration tests

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 81.25000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 62.89%. Comparing base (7ee257f) to head (fd78490).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1444      +/-   ##
==========================================
+ Coverage   62.64%   62.89%   +0.25%     
==========================================
  Files         257      257              
  Lines       16867    16883      +16     
==========================================
+ Hits        10566    10619      +53     
+ Misses       5798     5757      -41     
- Partials      503      507       +4     

Files	Coverage Δ
x/tokenfactory/keeper/grpc_query.go	66.66% <81.25%> (+13.72%)	⬆️

... and 1 file with indirect coverage changes

[codebycarson]

Do you want your username in here?

[dssei]

Good catch

[codebycarson]

Is this for generating the proto files or for generating the openapi yml?

[dssei]

Its for both, will add another readme for docs generation in a separate PR

[yzang2019]

This is really nicee!

[codebycarson]

I would make sure protocol team signs off on these version changes

[yzang2019]

Is there a reason to bump protobuf version?

[dssei]

hm, good question. I was not specifically looking to bump. But with ignite tools installed, I think this was done automatically on generation step. I can roll this back

[dssei]

@yzang2019 addressed this

[yzang2019]

This is really nicee!