[aaqilniz]

• Implements the jsonContains operator mapping inside MySQL.prototype.buildExpression to support containment queries (such as those required for referencesMany relations).
• Automatically parses and normalizes stringified JSON or single values into an array, generating MySQL-native JSON_CONTAINS(col, CAST(? as JSON)) expressions connected with OR.
• Adds comprehensive unit and integration tests covering record filtering and raw SQL string/parameter generation.

This PR depends on PR@loopback-next. The find method never resolves the options parameter. This PR adds that.

This PR also depends on loopbackio/loopback-datasource-juggler#2615. The datasource-juggler identifies the inq filter with referencesMany and converts the filter to jsonContains.

Checklist

• DCO (Developer Certificate of Origin) signed in all commits
• npm test passes on your machine
• New tests added or existing tests modified to cover all changes
• Code conforms with the style guide
• Commit messages are following our guidelines