feat: Remove folder conversation filter when folder deleted - WPB-13905

[samwyndham]

WPB-13905 [iOS] Remove `Folder` filter if folder deleted - edge case for improvement

Issue

Currently when the folder filter is applied and the folder is deleted by removing its final conversation (locally or remotely), the folder filter remains leaving an empty conversation list.

This PR ensures the folder filter is removed when the folder is deleted. Specifically it:

• Introduces ConversationFilterSelector that updates the conversation filter based on system events rather than user selection - for now it only handles folder deletions but could handle the events if needed.
• Introduces a way of setting the current filter via the main coordinator without causing other navigation
• Replaces ConversationDirectoryType.allFolders with ConversationDirectoryType.nonDeletedFolders - the users of ConversationDirectoryType only care about folders that are not marked for deletion.
• Removes a bunch of dead code leftover from when folders we displayed as collapsable sections.

Old

Simulator.Screen.Recording.-.Test.Device.-.2024-11-29.at.12.23.46.mp4

New

Simulator.Screen.Recording.-.Test.Device.-.2024-11-29.at.12.19.35.mp4

Testing

Please test on iPhone & iPad

Locally

1. Navigate to Conversations tab
2. Long press on a conversation
3. Tap "Move to..."
4. Tap + icon
5. Enter a folder name and tap "Create"
6. Tap the filter button
7. Select the folder from step 5
8. Verify the conversations list is filtered by the folder
9. Long press then conversation.
10. Tap "Remove from "
11. Verify the conversations list filter is removed an all conversations are shown.

Remotely

1. On device 1 do steps 1-8 from above
2. On device 2 remove the conversation from the folder
3. On device 1 verify the conversations list filter is removed an all conversations are shown.

Checklist

• Title contains a reference JIRA issue number like [WPB-XXX].
• Description is filled and free of optional paragraphs.
• Adds/updates automated tests.

[github-actions]

Test Results

    4 files    564 suites   8m 37s ⏱️
4 277 tests 4 277 ✅ 0 💤 0 ❌
4 285 runs  4 285 ✅ 0 💤 0 ❌

Results for commit 9651296.

♻️ This comment has been updated with latest results.

[johnxnguyen]

Nice work!