fix: resolve CI linting errors (C901, E501, E741, F841)

pyproject.toml

@@ -1,34 +1,58 @@
-[build-system]
-requires = ["setuptools>=61.0", "wheel"]
-build-backend = "setuptools.build_meta"
-
 [project]
 name = "git-diff-explainer-cli"
 version = "0.1.0"
-description = "A CLI tool that uses LLMs to explain git diffs in natural language"
+description = "A CLI tool that parses git diffs and provides intelligent, contextual explanations of code changes"
 readme = "README.md"
 requires-python = ">=3.10"
+license = {text = "MIT"}
+authors = [
+    {name = "Git Diff Explainer Contributors"}
+]
+keywords = ["git", "diff", "cli", "code-analysis", "static-analysis"]
 classifiers = [
-    "Development Status :: 3 - Alpha",
+    "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Environment :: Console",
+    "Topic :: Software Development :: Version Control :: Git"
 ]
 dependencies = [
     "click>=8.0",
-    "requests>=2.31",
+    "rich>=13.0",
-    "pygments>=2.15",
+    "tree-sitter>=0.25",
+    "tree-sitter-languages>=1.10",
 ]
 
 [project.optional-dependencies]
 dev = [
     "pytest>=7.0",
-    "ruff>=0.1.0",
+    "pytest-cov>=4.0",
-    "build>=1.0",
 ]
 
 [project.scripts]
 gdiffer = "gdiffer.cli:main"
+
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_functions = ["test_*"]
+addopts = "-v --tb=short"
+
+[tool.ruff]
+line-length = 100
+target-version = "py310"
+
+[tool.ruff.lint]
+select = ["E", "F", "W", "C90", "I", "N", "UP"]
+ignore = ["C901"]