[Feature Request]: Configurable Default Subtitle Language setting

### Guidelines

- [X] I have searched the issue tracker for [open](https://github.com/FreeTubeApp/FreeTube/issues?q=is%3Aopen+is%3Aissue) and [closed](https://github.com/FreeTubeApp/FreeTube/issues?q=is%3Aissue+is%3Aclosed) issues that are similar to the feature request I want to file, without success.
- [X] I have searched the [documentation](https://docs.freetubeapp.io/) for information that matches the description of the feature request I want to file, without success.
- [X] This issue contains only one feature request.

### Problem Description

Hi, I have FreeTube's UI set to Catalan and subtitles defaulting to on, and this is great, however I watch a lot of English language content and as a native speaker of English, google translated Catalan being the default isn't very desirable. However I also have audio processing disorder as a symptom of my ADHD and so I like having English subtitles.

### Proposed Solution

Allow subtitle language to be set to Original Language

### Alternatives Considered

Allow a default language or priority list for languages to be set

### Issue Labels

new feature, new optional setting

### Additional Information