feat: redesign website to showcase all Lux capabilities

- New tagline: "The Language That Changes Everything"
- Highlight 6 key features: algebraic effects, behavioral types,
  schema evolution, dual compilation, native performance, batteries included
- Add sections for behavioral types (is pure, is total, is idempotent)
- Add section for schema evolution with migration examples
- Add section for dual compilation (C and JavaScript)
- Add "Why Lux?" comparisons (vs Haskell, Rust, Go, TypeScript, Elm, Zig)
- Add built-in effects showcase (Console, File, Http, Sql, etc.)
- Add developer tools section (package manager, LSP, REPL, etc.)
- Fix navigation to use anchor links (single-page site)
- Update footer to link to GitHub docs/examples
- Add README with local testing instructions

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

website/lux-site/README.md

@@ -0,0 +1,72 @@
+# Lux Website
+
+## Testing Locally
+
+The website is a static HTML site. To test it with working navigation:
+
+### Option 1: Python (simplest)
+```bash
+cd website/lux-site/dist
+python -m http.server 8000
+# Open http://localhost:8000
+```
+
+### Option 2: Node.js
+```bash
+npx serve website/lux-site/dist
+# Open http://localhost:3000
+```
+
+### Option 3: Nix
+```bash
+nix-shell -p python3 --run "cd website/lux-site/dist && python -m http.server 8000"
+```
+
+### Option 4: Direct file (limited)
+Open `website/lux-site/dist/index.html` directly in a browser. Navigation links will work since they're anchor links (`#features`, `#effects`, etc.), but this won't work for multi-page setups.
+
+## Structure
+
+```
+website/lux-site/
+├── dist/
+│   ├── index.html      # Main website
+│   └── static/
+│       └── style.css   # Styles
+├── src/
+│   ├── components.lux  # Lux components (for future generation)
+│   ├── pages.lux       # Page templates
+│   └── generate.lux    # Site generator
+├── LUX_WEAKNESSES.md   # Issues found during development
+└── README.md           # This file
+```
+
+## Building with Lux
+
+Once the module system is working (fixed!), you can generate the site:
+
+```bash
+./target/release/lux website/lux-site/src/generate.lux
+```
+
+The HTML module is now functional and can render HTML from Lux code:
+
+```lux
+import stdlib/html
+
+let page = html.div([html.class("container")], [
+    html.h1([], [html.text("Hello!")])
+])
+
+Console.print(html.render(page))
+// Output: <div class="container"><h1>Hello!</h1></div>
+```
+
+## Deployment
+
+For GitHub Pages or any static hosting:
+
+```bash
+# Copy dist folder to your hosting
+cp -r website/lux-site/dist/* /path/to/deploy/
+```