Add option for click to play continue watching/next up rows (#1405)

## Description
Adds an option under Settings->Customize home page->Settings, "Continue
watching/Next up click behavior":
- When disabled (the default), clicking goes to the item's details page
- When enabled, clicking starts playback for the item from its resume
position

This only applies to the continue watching, next up, or combined rows.
All other rows go to the details page no matter what.

### Related issues
Closes #1007

### Testing
Emulator

## Screenshots
N/A

## AI or LLM usage
None

app/src/main/proto/WholphinDataStore.proto

@@ -94,6 +94,7 @@ message HomePagePreferences{
   bool enable_rewatching_next_up = 2;
   bool combine_continue_next = 3;
   int32 max_days_next_up = 4;
+  bool click_to_play = 5;
 }
 
 enum ThemeSongVolume {