Modularize Unity Support for Version-Specific Functionality

[teogor]

Modularize Drifter Unity Support for Version-Specific Functionality

This pull request introduces a significant modularization effort for the Drifter Unity core module. Previously, a single module supported all Unity versions. Now, we transition to a more flexible and efficient structure:

Changes:

• Version-Specific Modules: Created separate modules within the unity directory, named based on Unity versions (e.g., v2022.3.7f1).
• Base Module: Established a common base module for shared functionalities across all Unity versions.
• Dependency Management: Updated dependencies and build configurations to utilize the appropriate version-specific modules.
• Improved Maintainability: Modularization enhances code organization, clarity, and future updates.

Benefits:

• Supports multiple Unity versions: Enables seamless integration with various Unity environments.
• Reduced bloat: Each module contains only relevant code for its specific version, minimizing overall size.
• Simplified updates: Changes and improvements can be targeted to specific Unity versions as needed.
• Enhanced flexibility: Allows for future expansion and support for additional Unity versions.