feat: enhance Java tree-sitter parser with advanced language structures

This enhancement significantly expands the Java parser's capabilities to recognize and parse a wide range of Java language constructs:

- Added support for enum declarations and enum constants
- Added support for annotation type declarations and elements
- Added support for field declarations
- Added support for constructor declarations
- Added support for lambda expressions
- Added support for inner and anonymous classes
- Added support for type parameters (generics)
- Added support for package and import declarations

These improvements enable more comprehensive code analysis for Java projects, providing better definition extraction and navigation capabilities.

Signed-off-by: Eric Wheeler <[email protected]>

Author: Eric Wheeler