Milestone2

Feature Enhancements:

1) Selective XML to JSON Conversion via JSONPointer

• Introduced an optimized toJSONObject(Reader reader, JSONPointer path) method to extract only a specific subtree of an XML document based on a JSONPointer.
• Uses a streaming XML parser to avoid full document parsing, improving performance for large XML files.
• Supports normalization of trailing slashes in path inputs.

2) XML Subtree Replacement Support

• Added overloaded method toJSONObject(Reader reader, JSONPointer path, JSONObject replacement) to allow replacing a subtree at a specified path with a provided JSON object.
• Handles both shallow (1–2 levels) and deep paths using efficient parsing strategies.
• Special handling added for trailing slashes: when present, the content inside the target is replaced, not the key itself.

3) Public API Exposure for JSON Pointer Token Processing

• Made unescapeToken(String token) publicly accessible for consistent token unescaping across modules.

Infrastructure Improvements:

• Added CountingReader, a custom reader wrapper that tracks the parsing progress in character count, helping