Replace Quarto site with static HTML generator

- Add site/generate.py: static site with search, filtering, sorting, dark mode
- Add site/static/style.css and main.js for the new frontend
- Extend parse.py: fetch CRAN published dates, PyPI release dates, and
  discover GitHub repos from CRAN pages as fallback data sources
- Migrate from Poetry to uv (pyproject.toml + uv.lock)
- Update CI workflow to use uv and generate.py pipeline
- Add CONTRIBUTING.md with entry format guidelines
- Add "Submit a Project" button to site nav
- Update review-pr skill with all accepted entry formats
- Update CLAUDE.md to reflect new architecture
- Remove Quarto files (_quarto.yml, *.qmd, sync-site skill, poetry.lock)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -13,9 +13,9 @@ A companion website is generated from this data and deployed to GitHub Pages.
 The pipeline works as follows:
 
 1. **`README.md`** — The source of truth. All library entries follow the format: `- [name](url) - Description.`
-2. **`parse.py`** — Parses `README.md`, extracts GitHub repo URLs, fetches last commit dates via the GitHub API (using `PyGithub` with multithreading), and writes `site/projects.csv`.
-3. **`site/`** — A [Quarto](https://quarto.org/) website project (`_quarto.yml`) that renders `projects.csv` into an interactive table. Output goes to `site/docs/`.
-4. **CI** (`.github/workflows/build.yml`) — Runs daily and on push to `master`: runs `parse.py`, renders the Quarto site, and deploys to GitHub Pages via `gh-pages` branch.
+2. **`parse.py`** — Parses `README.md`, extracts GitHub/CRAN/PyPI URLs, fetches last commit dates and stars via the GitHub API (using `PyGithub` with multithreading), and writes `site/projects.csv`.
+3. **`site/generate.py`** — Reads `projects.csv` (or parses `README.md` directly) and generates a static HTML site with search, filtering, sorting, and dark mode.
+4. **CI** (`.github/workflows/build.yml`) — Runs daily and on push to `main`: runs `parse.py`, runs `site/generate.py`, and deploys to GitHub Pages via `gh-pages` branch.
 
 Supporting scripts:
 - `cranscrape.py` — Scrapes CRAN package pages to find associated GitHub repos; writes `cran.csv`.
@@ -24,21 +24,29 @@ Supporting scripts:
 ## Commands
 
 ```bash
-# Install dependencies (uses Poetry, requires Python 3.11+)
-poetry install --no-root
+# Install dependencies (uses uv, requires Python 3.11+)
+uv sync --no-install-project
 
 # Run the parser (requires GITHUB_ACCESS_TOKEN env var)
-GITHUB_ACCESS_TOKEN=<token> poetry run python parse.py
+GITHUB_ACCESS_TOKEN=<token> uv run python parse.py
 
-# Render the Quarto site (requires Quarto + R with knitr/rmarkdown/DT)
-quarto render site
+# Generate the static site
+uv run python site/generate.py
 ```
 
 ## Contributing Entries
 
-Each entry in `README.md` must follow the pattern:
+See `CONTRIBUTING.md` for full guidelines. Accepted entry formats:
+
 ```
-- [Project Name](https://url) - Short description ending with a period.
+- [Project Name](https://github.com/owner/repo) - Description ending with a period.
+- [Project Name](https://site.com) - Description ending with a period. [GitHub](https://github.com/owner/repo)
+- [Package Name](https://cran.r-project.org/package=pkg) - Description ending with a period.
+- [package-name](https://pypi.org/project/pkg/) - Description ending with a period.
 ```
 
-Entries are grouped under language headings (##) and category subheadings (###). `parse.py` relies on this exact regex pattern to extract entries: `^\s*- \[(.*)\]\((.*)\) - (.*)$`
+CRAN and PyPI entries may optionally append `[GitHub](url)` after the description.
+
+Entries are grouped under language headings (`##`) and category subheadings (`###`). Commercial/proprietary projects go under `## Commercial & Proprietary Services`.
+
+`parse.py` relies on this regex to extract entries: `^\s*- \[(.*)\]\((.*)\) - (.*)$`