Fix generated code not building when conflicing names

[stwiname]

Description

Fixes codegen generating an invalid CosmosMessageTypes.ts when different proto files have the same message names. To fix this the imports are updated to use * and the exported types are now wrapped in namespaces.

This PR also filters the types to only include RPC messages that are prefixed with Msg following the cosmos naming convention

Fixes #215

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have tested locally
• I have performed a self review of my changes
• Updated any relevant documentation
• Linked to any relevant issues
• I have added tests relevant to my changes
• Any dependent changes have been merged and published in downstream modules
• My code is up to date with the base branch
• I have updated relevant changelogs. We suggest using chan

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🔴	Statements	37.23%	1721/4622
🟡	Branches	63.58%	96/151
🔴	Functions	19.25%	36/187
🔴	Lines	37.23%	1721/4622

Test suite run success

38 tests passing in 5 suites.

Report generated by 🧪jest coverage report action from a4983ea