* [rcore] fix rpi4 Failed to get DRM resources
card1 is not always the the correct card to use on rpi4
rpi os finds the correct card and links it to /dev/dri/by-path/platform-gpu-card during boot.
this fix makes sure that we always point to the correct card on rpi4
* Update rcore.c
raylib modules have been slightly renamed to add some identity and note that they are independent modules that can be used as standalone separate parts of raylib if required.
The renamed modules are:
- `core` -> `rcore`
- `shapes` -> `rshapes`
- `textures` -> `rtextures`
- `text` -> `rtext`
- `models` -> `rmodels`
- `camera` -> `rcamera`
- `gestures` -> `rgestures`
- `core` -> `rcore`
All the build systems has been adapted to this change.
