[WIP][FEAT]: Add global config page and demo component. Missing the code and missing to add these new tyopes FilesUIConfig and IconsConfig

[WIP][FEAT]: Testing context and amissing to add new page for globals(section1=darkmode, section2=customfileicons) A. ALso add type IconsMap

[WIP][FEAT]: Add darkmode in the rest of pages with context, also keeping track of the darkmode selection. Missing to refactor some custom components to work well in darkmode

[REF]: Change icons style location in a sass file. ALso overcome the issue when Mui sets box-sizing=inherit

24 add download page and upload page

[REF]: Commented file reader page. DIscuss relevance, maybe example with CSV but functions are not the best for reading. Missing to override all reader properties. Download page missing to structure better like same host with filemosaic, another host with file mosaic and with onDownload fucntion.

23 feat add video and image preview demo page

[FEAT]: Add img and vid ful screen previews. Add route and option in mainsidebar for fullscreen demo

[FEAT]: Add img and vid ful screen previews. Add route and option in mainsidebar for fullscreen demo