* Link Compound's `TypographyTokens` to `ElementTheme`.
Also add some docs about when we should use each set of tokens.
* Renamed `LocalColors` to `LocalLegacyColors`.
Made both `LocalLegacyColors` and `LocalCompoundColors` internal. This means it will need to always be used through `ElementTheme.`
Also, removed any usages of `LocalColors.current` accross the project, they're now used through `ElementTheme.legacyColors`.
* Added tokens.
* Apply color to MaterialTheme, also add typography.
* Map colors to the right ones in the themes.
* Create and improve previews of some components
* More preview improvements
* Add `tertiary` and `onTertiary` colors, remove some unused ones.
* Fix usage of deleted color token
* Fix bug in Switch previews
* Create a separate `:libraries:theme` module to keep everything related to colors, typography and Compound in general.
* Fix `DatePickerPreview`
* Add missing Compound generated files by fixing their package name
* Move `ElementTheme` to the `:libraries:theme` module, make some variables internal.
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Co-authored-by: ElementBot <benoitm+elementbot@element.io>
