Update mime type icons and icons in "New" menu

[AndyScherzinger]

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we aim to have the icons updated for v29, the remaining parts can be ignored or implemented given the 29-timebox

• Upload files: current icon
• Upload folders: drive-folder-upload in --color-primary-element (New entry pushed to 30)
• Folder: folder in --color-primary-element (New design with headings pushed to 30)
• Update icons in "New" menu text#5535
  • Text file: article in --color-text-maxcontrast
  • Description: notes
• Update icons in "New" menu richdocuments#3537
  • Document: description in #49abea
  • Spreadsheet: file-table-box in #9abd4e
  • Presentation: file-presentation-box in #f0965f
  • Diagram: drawing-box in #b39114

Before	After

[jancborchardt]

Just FYI @tobiasKaminsky @juliushaertl @sorbaugh we had to adjust the colors of 2 icons:

Text file: article in --color-text-maxcontrast

Considering this is also used in the file list and grid view (and in the widgets) and black this would be very dark then, we will keep it grey.

Diagram: drawing-box in #b39114

This fulfills the proper 3:1 contrast requirement and works in both light and dark theme.

cc @nimishavijay

[mejo-]

nextcloud/text#5540 for the text side.

[AndyScherzinger]

@jancborchardt

Text file: article in --color-text-maxcontrast

Wouldn't this than also apply to the file listing, so the general mime type icon if there is no preview? And if so wouldn't this also lead to the need to adapt all "grey" mimetype icons (!) which we would want to prevent atm since that change is way larger to implement and should than be moved to v30 in my opinion. (or we just do it for the text mime type, than it would be okay)

[Pytal]

New PRs:

• feat: Add new mdi New file menu icons #44368
• feat: Add new mdi icons richdocuments#3538

Updated:

• fix(files): Change icons+wording for adding text doc and folder description text#5540

[Pytal]

Text file: article in --color-text-maxcontrast

Wouldn't this than also apply to the file listing, so the general mime type icon if there is no preview? And if so wouldn't this also lead to the need to adapt all "grey" mimetype icons (!) which we would want to prevent atm since that change is way larger to implement and should than be moved to v30 in my opinion. (or we just do it for the text mime type, than it would be okay)

Noticed this in the rendering of the mimetype icons (e.g. in the sidebar) which uses a background-image url and doesn't support CSS variables so I used the same grey as before #969696