Add Unicode and Forward Slash Decoding to JSON Formatter; Update Benchmark and Tests

[Sumith-Kumar-Saini]

Summary:
Enhances the fast-json-format library to support decoding of \uXXXX Unicode and \/ forward slash escape sequences for improved readability. Updates benchmarking and documentation to include the lossless-json library for comparison and introduces new automated tests.

Key Changes:

• Core enhancement:

  • Rewrote fastJsonFormat for faster string processing and added decoding for Unicode and forward slash escapes.
  • Improved performance by using chunked string operations and whitespace skipping.

• Testing:

  • Added new test suites for Unicode and forward slash handling.
  • Updated existing tests for improved coverage and validation.

• Benchmarking:

  • Integrated lossless-json as a new comparison target.
  • Updated benchmark summary and output formatting.

• Project configuration:

  • Bumped package version to 0.4.0.
  • Added lossless-json as a dev dependency.
  • Updated prepack and test scripts for packaging and test discovery.

• Documentation:

  • Updated README benchmark table to include lossless-json results.

Impact:
Improves developer readability of formatted JSON containing Unicode or escaped slashes, enhances test reliability, and expands benchmark insights.

Testing:
New and updated Jest test suites verify Unicode decoding, escape handling, and output parity with JSON.stringify.