feat: add comprehensive test suite

This commit introduces a comprehensive test suite for the Python Code Harmonizer, making it production-ready.

The project has been restructured into a standard Python package with a pyproject.toml file, and the main application has been refactored into a runnable console script accessible via the `harmonizer` command.

A new `tests/` directory contains:
- `test_engine.py`: Unit tests for the core semantic engine.
- `test_parser.py`: Unit tests for the AST parser.
- `test_harmonizer.py`: An integration test for the main application.

The `.gitignore` file has also been updated to exclude build artifacts like `*.egg-info/`.

Author: google-labs-jules[bot]

.gitignore

@@ -0,0 +1,2 @@
+__pycache__/
+*.egg-info/

pyproject.toml

@@ -0,0 +1,21 @@
+[build-system]
+requires = ["setuptools>=61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "PythonCodeHarmonizer"
+version = "1.1.0"
+description = "A semantic code debugger."
+readme = "README.md"
+license = { file="LICENSE" }
+requires-python = ">=3.8"
+classifiers = [
+    "Programming Language :: Python :: 3",
+]
+
+[project.scripts]
+harmonizer = "src.harmonizer.main:run_cli"
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["src*"]

requirements.txt

@@ -0,0 +1 @@
+pytest

src/divine_invitation_engine_V2.py

@@ -193,6 +193,11 @@ def analyze_text(self, text: str) -> Tuple[Coordinates, int]:
         self._word_cache[cache_key] = result
         return result
 
+    @property
+    def all_keywords(self) -> Set[str]:
+        """Returns all unique keywords from the vocabulary."""
+        return set(self._keyword_map.keys())
+
     @staticmethod
     def get_distance(c1: Coordinates, c2: Coordinates) -> float:
         """Optimized Euclidean distance calculation"""