Unified the import paths of the 'Identifier' type across multiple files to ensure consistency. The 'Identifier' type is now imported from '../types/Identifier' instead of 'src/types/Identifier'. This change reduces ambiguity and aligns the import pattern throughout the codebase.
- Moved `TSinjex` class to `classes` directory for better organization.
- Updated imports across the codebase to reflect the new location of `TSinjex`.
- Introduced `Identifier` type to standardize dependency identifiers.
- Enhanced JSDoc comments for improved clarity and consistency.
- Adjusted error messages for `DependencyResolutionError` to provide clearer information.
- Updated and expanded decorator and function types to use `Identifier` type.
