feat: initial Argus - AI-powered FinOps agent

Argus is an all-seeing eye on your AWS costs:
- Scan for optimization opportunities (unused resources, oversized instances)
- Evaluate Terraform plans for cost impact
- Generate weekly/monthly cost reports
- Integrate with Atlantis for pre-apply cost analysis

Components:
- CLI tool (argus scan/evaluate/report)
- GitHub Action for CI/CD integration
- AWS Scanner for resource analysis
- AI engine for intelligent recommendations

Features:
- Unused EBS volumes, idle EC2, oversized RDS
- Cost delta on Terraform changes
- Atlantis integration
- Slack/email notifications

pyproject.toml

@@ -0,0 +1,72 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "argus-finops"
+version = "0.1.0"
+description = "AI-powered FinOps agent for AWS"
+readme = "README.md"
+license = "Apache-2.0"
+requires-python = ">=3.10"
+authors = [
+    { name = "ghndrx" }
+]
+keywords = ["aws", "finops", "cost", "optimization", "terraform", "ai"]
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Intended Audience :: Developers",
+    "Intended Audience :: System Administrators",
+    "License :: OSI Approved :: Apache Software License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Topic :: System :: Systems Administration",
+]
+
+dependencies = [
+    "boto3>=1.34.0",
+    "requests>=2.31.0",
+    "pyyaml>=6.0",
+    "rich>=13.0.0",
+    "typer>=0.9.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=7.4.0",
+    "pytest-cov>=4.1.0",
+    "black>=23.0.0",
+    "ruff>=0.1.0",
+    "mypy>=1.7.0",
+]
+
+[project.scripts]
+argus = "argus.cli:main"
+
+[project.urls]
+Homepage = "https://github.com/ghndrx/argus"
+Documentation = "https://github.com/ghndrx/argus#readme"
+Repository = "https://github.com/ghndrx/argus"
+Issues = "https://github.com/ghndrx/argus/issues"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/argus"]
+
+[tool.black]
+line-length = 100
+target-version = ["py310", "py311", "py312"]
+
+[tool.ruff]
+line-length = 100
+select = ["E", "F", "I", "N", "W"]
+
+[tool.mypy]
+python_version = "3.11"
+warn_return_any = true
+warn_unused_configs = true
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+addopts = "-v --cov=argus"