Inline css

• Vite is now configured to build the project as a library and not as a script.
• build now converts Imported css files to js files exporting a string (better for bundling).
• a new helper importInlineCSS() allow to add imported css to the DOM
• fixes #844 (closed)

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• This commits targets only one specific issue
• The commit message follows our guidelines
• Unit Tests for the changes have been added
• Ideally acceptance Tests for the changes have been added
• Docs have been added or updated
• Associated Release notes have been added or updated
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