feat(pool_manager): pools query improvement

[kerber0x]

Description and Motivation

This PR modifies the Pool query on the pool manager so that it returns a list of pools if desired. This can help frontends list all the pools in the contract. It offers pagination.

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.