Move CI, dev tools, and configs from root-level scattered locations into
a
unified `dev/` directory structure. Update all references across build
scripts, documentation, and editor configurations.

Also consolidate editor config generation into build.rs for automated
synchronization of rust-analyzer settings across VS Code and Zed.

Add a fixed navigation bar, full-height hero section with tiled
grid background, and an animated command carousel terminal. Style
download links as interactive buttons and incorporate syntax
highlighting styles. Introduce MlingDisplay JS parser for rendering
display.rs-style markup with colors, headings, and formatting.
Update version file config to include dist/index.html.