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>

Dockerfile.test

@@ -0,0 +1,32 @@
+FROM ubuntu:22.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    jq \
+    bc \
+    shellcheck \
+    ca-certificates \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install bats (Bash Automated Testing System)
+RUN curl -sL https://github.com/bats-core/bats-core/archive/refs/tags/v1.11.0.tar.gz | tar xz \
+    && cd bats-core-1.11.0 \
+    && ./install.sh /usr/local \
+    && cd .. \
+    && rm -rf bats-core-1.11.0
+
+WORKDIR /app
+
+# Copy scripts
+COPY solar-analysis/ /app/solar-analysis/
+
+# Make scripts executable
+RUN chmod +x /app/solar-analysis/*.sh
+
+WORKDIR /app/solar-analysis
+
+ENTRYPOINT ["bats", "tests/"]