Make nilmtk.github.io the canonical ecosystem guide

.github/workflows/site-checks.yml

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+name: Site checks
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+permissions:
+  contents: read
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: Check landing page structure and links
+        run: python3 scripts/check_site.py

README.md

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+# NILMTK ecosystem site
+
+This repository publishes the canonical NILMTK ecosystem router at
+<https://nilmtk.github.io/>. It explains which repository to use, the supported
+installation paths, the container policy, citation guidance, and the route from
+a model contribution to a leaderboard result.
+
+The site is deliberately dependency-free: semantic HTML, one stylesheet, and a
+small progressive-enhancement script. Existing generated core API documentation
+under `nilmtk/` remains separate from the landing page.
+
+## Preview
+
+```bash
+python3 -m http.server 8000
+```
+
+Then open <http://localhost:8000/>.
+
+## Verify
+
+```bash
+python3 scripts/check_site.py
+```
+
+The check rejects duplicate IDs, broken local assets and fragment links,
+insecure public URLs, missing canonical repository or citation links, and
+accidental reintroduction of the retired Bootstrap/jQuery stack.
+
+## Editing policy
+
+- Keep this page a router; detailed package APIs belong in their repositories.
+- Keep one recommended Python path and one general onboarding image.
+- Treat NILMbench's CPU and CUDA images as scientific runtimes, not per-model
+  development images.
+- Update citation guidance only when the canonical repository papers change.
+- Verify commands against the target repository before publishing them here.