feat: add initial uipath explainator implementation

Scaffold project with pyproject.toml and environment configuration
Implement core modules including CLI, Gemini integration, and scanner

pyproject.toml

@@ -0,0 +1,23 @@
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "uipath-explainator"
+version = "0.1.0"
+description = "Extract, prune, and explain UiPath workflow dependencies with Gemini."
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+  "google-genai>=1.12.1",
+  "python-dotenv>=1.0.1",
+]
+
+[project.scripts]
+uipath-explainator = "uipath_explainator.cli:main"
+
+[tool.setuptools]
+package-dir = {"" = "src"}
+
+[tool.setuptools.packages.find]
+where = ["src"]