chore/bump libraries

[juliusknorr]

Splitting out the library bumps and adjustments from #830

• chore: Bump @nextcloud/dialogs and @nextcloud/files
• chore: Move to new file picker api for esm compatibility
• fix: Proper evaluation order when building errors strings
• fix: Fix missing actions for empty default slot
• fix: Add aria-label to pagination

[juliusknorr]

Will split in smaller PRs