Feature: minify javascript & css

[cornejong]

Feature: minify templ scripts,

added -minify-js flag (explicit opt-in) to the generate command to minify templ scripts &

minifier: tdewolff/minify/v2

todo

• [x] Add minification to generator for templ script components
• [x] Add -minify-js flag to generator cmd
• [x] Add minification for script tags in templates
• [x] Add minification for style tags in templates
• [x] Tests
• [x] Docs