refactor(files): migrate to new NcForm* components (app settings design)

[susnux]

• Resolves: Files settings reorganization #55668

Summary

Implements the new files app settings design.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

[ShGKme]

Just a reminder, in Vue 2 you need to add :legacy="false" to the NcAppSettingsDialog

[susnux]

Just a reminder, in Vue 2 you need to add :legacy="false" to the NcAppSettingsDialog

already done

[artonge]

🐘

[ShGKme]

Can approve from the new component usage side

[susnux]

/backport to stable32

[backportbot]

The backport to stable32 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable32
git pull origin stable32

# Create the new backport branch
git checkout -b backport/56408/stable32

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick d1b00335 82237a8b ad0beef0

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/56408/stable32

Error: Failed to check for changes with origin/stable32: No changes found in backport branch

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.