Unify assets libraries
### Description Create a single library for Desktop and Android assets. This will be done by exporting Mozilla's Figma files as .fig then importing them into our organization. The next step will be to analyze each use case and come up with a grouping approach, considering Desktop and Android, and publish the library so it can be used in the following steps. ### Scope - Icons - Favicons - OS File Types - Other brand assets ### Design estimate - Complexity: medium (3 days) - Uncertainty: low (1.0) - Total: 3 days - Actual: 1 day ### Checklist - [x] Export Mozilla's files - [x] Import files to Tor Project UX - [x] Clean unnecessary elements - [x] Create a new grouping arrangement - [x] Adjust documentation for TB's context - [x] Publish library ### Figma file [Link to the file](https://www.figma.com/design/gWQXyAQyFJ7fwG8mRqY69a/Desktop-and-Android-assets?node-id=1-737&t=vPK8CyG3dF9lhsMf-1)
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