[Extra Metadata Loader] Per-game settings for Logo asset

[spineduke]

Extra Metadata Loader

A method that allows the user to define a logo position and size for a specific game on Playnite (it should override the default setting that is configured in the extension settings)

If a custom setting is enabled for a game, any changes to the default setting should probably not disturb the custom settings until they are cleared/disabled.

[TheRealFlamepanther]

It should be possible to pre-populate such per-game settings when importing logos from Steam. Looking at a few games on SteamDB.info, the "library_assets" area has properties like this:

logo_position/pinned_position BottomLeft logo_position/width_pct 65.23255813953489 logo_position/height_pct 79.63666587508902