feat: add bank denom metadata to rollapp genesis

[VictorTrustyDev]

PR Standards

Opening a pull request should be able to meet the following requirements

Closes: #293 & #168

Note: I'm just implement this without writing test cases. If needed, please feel free to implement it by yourself with additional code and close this PR.

Result:

rollapp_evm --home ~/.roller/rollapp start 2>&1 > /dev/null &
rollapp_evm --home ~/.roller/rollapp q bank denom_metadata

metadatas:
- base: uRAX
  denom_units:
  - aliases: []
    denom: uRAX
    exponent: 0
  - aliases: []
    denom: RAX
    exponent: 18
  description: Denom metadata for RAX (uRAX)
  display: RAX
  name: Rax
  symbol: RAX
  uri: ""
  uri_hash: ""
pagination:
  next_key: null
  total: "1"

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For Author:

• Targeted PR against correct branch
• included the correct type prefix in the PR title
• Linked to Github issue with discussion and accepted design
• Targets only one github issue
• Wrote unit and integration tests
• All CI checks have passed
• Added relevant godoc comments

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For Reviewer:

• confirmed the correct type prefix in the PR title
• Reviewers assigned
• confirmed all author checklist items have been addressed

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After reviewer approval:

• In case targets main branch, PR should be squashed and merged.
• In case PR targets a release branch, PR should be rebased.