feat: build css from less files locally

[fmartingr]

• Added make commands to build the CSS, which was lost in time.
• Build is performed locally and CSS files are committed to the repository, so there's no build process required for distributors.
• Right now, using bun since it was the easier path, but the build process is built into a script that can be modified to add alternatives, it defaults to having lessc installed locally and uses bun if it finds it.
• Avoid embedding unnecessary files in the binary.
• style.css is generated and minified for the webapp, and archive.css is generated to display the top bar in archives.

[Monirzadeh]

Thank you for start this (it is help alot). just three things.
1. this error in Linux machine
2. minify internal/view/assets/css/style.css can save space(not much but not bad if we have that). is there any problem if we do that too?
actuality we edit less file and just generate CSS.
3. make style create a not minify version but you don't push that to repository.

Future me: combine CSS is a nice move from @fmartingr but maybe affect your work when start work on custom css. consider that.

[fmartingr]

Future me: combine CSS is a nice move from @fmartingr but maybe affect your work when start work on custom css. consider that.

The improvement I see is that we can split the styles and the archive page styles into two different files, since those are the only ones that are separated from the "main app". Let me try it.

[Monirzadeh]

LGTM 👍