[DuckPlayer] - 3. URL management & FE comms

[afterxleep]

Task/Issue URL: https://app.asana.com/0/1204099484721401/1207658406526197/f

Description:

• Introduces a custom OmniBar icon to be used on specific cases (Youtube videos in this case)
• Updates the URL to properly display duck:// addresses when DP is enabled
• Listen to AppSettings changes for DuckPlayer via NotificationCenter and pass them down to DuckPlayer and the UserScripts > FrontEnd via Combine
• Handle reloads when visiting a DuckPlayer page.
• Renames methods in DuckNavigationHandling for clarity
• @MainActorize all WebView navigation events
• Updated tests

Steps to test this PR:

• [x] Disable Duck Player and confirm Youtube.com works as expected

1. Install custom privacy config from https://jsonblob.com/api/1253721903368888320

2. Go to Settings and switch DuckPlayer to 'Ask mode'

3. Go to a Youtube Video, and confirm the overlay shows up.

4. Tap Watch in Duck Player (Might need to tap twice quickly due to an FE bug)

   • [x] Confirm video loads in DuckPlayer.

5. Go back

   • [ ] Tap Watch here, and confirm video loads in DuckPlayer.

6. Go to DuckPlayer settings and enable 'Always' mode

7. Open a video or reload a video page if you have it open

   • [x] Confirm video loads in Duck Player

8. While watching a video in Duck player, Hit 'reload'

   • [x] Confirm that the video still shows in Duck Player
   • [ ] Confirm you see the DuckPlayer icon in the URL bar when a video is playing in DP
   • [x] Confirm the URL says "Duck Player"
   • [x] Click the URL bar to select the text
   • [x] Confirm the text turns to a valid duck:// URL

9. Enable Settings > Appearance > Show Full Site Address

   • [x] Go back to DuckPlayer and confirm the URL is now the full duck:// address

[Bunn]

1 Tap Watch here, and confirm video loads in DuckPlayer.

• I believe you meant "without" Duck Player, right?

2 Confirm you see the DuckPlayer icon in the URL bar when a video is playing in DP

• This doesn't seem to be working: