HASSL v0.2.1 — PyPI packaging and import fixes

A small but important maintenance release to ensure HASSL installs and runs cleanly from PyPI.

🧰 Fixes & Improvements

📦 PyPI Packaging

• Fixed missing hassl.lark grammar file in wheels and source distributions.
• Added package-data and MANIFEST.in entries so .lark files are always included in builds.
• Verified importlib.resources correctly loads grammars both from editable installs and built packages.

🐍 Import & CLI Fixes

• Updated cli.py to construct Lark using importlib.resources (no filesystem dependency).
• Ensured all modules use relative imports for internal packages.
• Fixed edge case where grammar wasn’t found when installed globally via pip.

🧹 Packaging Hygiene

• Added pyproject.toml [tool.setuptools.package-data] entry:

  [tool.setuptools.package-data]
  "hassl" = ["**/*.lark"]
  

• Added fallback in MANIFEST.in
recursive-include hassl *.lark
  -Cleaned up duplicate egg-info and rebuild process for TestPyPI.