Add support for Testcontainers JDBC URLs

[nakamura-to]

Summary

• Added automatic inference of dialectName and driverClassName for Testcontainers JDBC URLs
• Enhanced the regex pattern in JdbcUtil to handle URLs starting with jdbc:tc:
• Added comprehensive tests for all supported database types

Motivation

When using Testcontainers for integration testing, users currently need to manually specify both the JDBC URL and the dialect/driver configuration. This PR improves the developer experience by automatically inferring these values from Testcontainers URLs.

Changes

• Updated jdbcUrlPattern regex to optionally match the tc: prefix in JDBC URLs
• Added test cases for all supported databases (PostgreSQL, MySQL, MariaDB, Oracle, SQL Server, DB2)

Test plan

• Added unit tests for Testcontainers URL inference
• All existing tests pass
• Code formatted with ./gradlew spotlessApply

Example usage:

domaCodeGen {
    url = "jdbc:tc:postgresql:13:///test"
    // dialectName and driverClassName are now automatically inferred\!
}

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