Implement activities (files versions)

[daniele-verducci]

🖼️ Screenshots

🏚️ Before	🏡 After
B	A

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not needed
• 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• 📅 Milestone is set
• 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI

[codacy-production]

Not up to standards ⛔

🔴 Issues 4 high · 11 medium · 43 minor

Alerts:
⚠ 58 issues (≤ 0 issues of at least minor severity)

Results:
58 new issues

Category	Results
Documentation	39 minor
ErrorProne	4 high
Performance	1 medium
CodeStyle	4 minor
Complexity	10 medium

View in Codacy

🟢 Metrics 172 complexity · 2 duplication

Metric	Results
Complexity	172
Duplication	2

View in Codacy

_{NEW Get contextual insights on your PRs based on Codacy's metrics, along with PR and Jira context, without leaving GitHub. Enable AI reviewer
TIP This summary will be updated as you push new changes.}

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/37498486797/artifacts/11429388555
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/38248370615/artifacts/11747525636
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/38396893559/artifacts/11814684541
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/38561146362/artifacts/11893339202
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)

[github-actions]

APK file: https://github.com/nextcloud/notes-android/actions/runs/38600254298/artifacts/11913732039
To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.
(please click on link to get QR code displayed)