[ENHANCEMENT] Introduced manual chunks and gzip.

[notsure]

Pull request

• Added gzip compression for production build
• add a static name for the manifest to avoid vite default (.vite/manifest.json)
• introduced first attempt of manual chunks to split the code into some shared parts.

Ticket

• Vite update leads to missing css in manifest.json #384

Browser testing

• npm run dev > works like before
• npm run build:profile > see different chunks
• npm run build > check the dist folder - you will see gz files and a manifest.json

Checklist

• I merged the current main branch (before testing)
• Added JSDoc and styleguide demo
• Tested all links in project relevant browsers
• Tested all links in different screen sizes
• Did run automated tests and linters
• Did assign ticket
• Double checked target branch

Review/Test checklist

• Did review code and documentation
• Tested all links in project relevant browsers
• Tested all links in different screen sizes
• Did check accessibility (Wave, only errors)
• Re-assign ticket to developer

[mob8607]

Looks good, but needs to be tested in a project I guess.