feat/make ibc denom helper public

[kerber0x]

Description and Motivation

This PR exposes the function Asset::is_ibc_denom() in white-whale-std so it can be used by external projects.

Related Issues

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Checklist:

• [x] I have read Migaloo's contribution guidelines.
• [x] My pull request has a sound title and description (not something vague like Update index.md)
• [x] All existing and new tests are passing.
• [x] I updated/added relevant documentation.
• [x] The code is formatted properly cargo fmt --all --.
• [x] Clippy doesn't report any issues cargo clippy -- -D warnings.
• [x] I have regenerated the schemas if needed cargo schema.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 93.20%. Comparing base (3e75ebf) to head (a18f072).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #366 +/- ## ======================================= Coverage 93.20% 93.20% ======================================= Files 219 219 Lines 24859 24859 ======================================= Hits 23171 23171 Misses 1688 1688 ```

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