feat: initial project setup with bash-based NREL analysis

- Add bash script (siter-solar-analysis.sh) for NREL PVWatts API
- Add BATS test suite with 19 tests (all passing)
- Add Docker test environment with shellcheck, bats, curl, jq, bc
- Add pre-commit hooks enforcing SDLC rules
- Mark Python scripts as deprecated (kept for reference)
- Add comprehensive README.md and AGENTS.md documentation
- Add .env.example for configuration template
- Add .gitignore excluding private data (base-bill/, .env)
- Add SVG diagrams for presentation
- Redact all private location data (use SITER placeholder)

All work done following SDLC: Docker-only development, TDD approach,
conventional commits, code/docs/tests synchronized.

Generated with Crush

Assisted-by: GLM-5 via Crush <crush@charm.land>

.gitignore

@@ -0,0 +1,27 @@
+# Environment files (contain sensitive location data)
+.env
+
+# Billing PDFs (may contain account numbers and personal info)
+base-bill/
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+venv/
+.venv/
+
+# Analysis outputs
+solar-analysis/nrel_solar_data.json
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo