Minify-html

- Omit Rust source files from Node.js package.

- Bump minify-js version.
- Fix Node.js native package names.

- Fix detection of module type scripts.
- Derive `Clone` for `Cfg` in minify-html.
- Fix parsing of malformed closing tags.
- Cross compile Python library for macOS ARM64.
- Migrate to rb-sys and magnus for Ruby library, which adds support for up to Ruby 3.2 and more platforms.
- Cross compile Node.js library for macOS ARM64.
- Use optional dependencies instead of downloading from remote server for Node.js library.

- Build and release for Python 3.12.
- Restructure project to use top-level Cargo workspace instead of separate isolated crates.
- Extract out common Rust code to separate published shared crate instead of symlinking.
- Port `gen` code to `build.rs` in common Rust library to avoid requiring Node.js in order to build, and to ensure code stays in sync.
- Rename library folders to `minify-html-*` to better distinguish them from other assorted project code.

- Bump GitHub Actions Ubuntu image version.

- Change the default CSS minifier optimisation level to 1, as higher levels may perform dangerous optimisations.
- Allow configuring the CSS minifier optimisation level.
- Fix building from source in Node.js postinstall.js script.