refactor: Add more checks to pre-commit

Updated existing pre-commit hooks and added some new hooks:

- Remove trailing whitespace
- Ensure every non-empty file ends with a new line
- Check YAML file validity
- Prevent adding large files
- Ensure any scripts with shebangs are executable

Added a GitHub action to run pre-commit on every commit. Removed any
existing actions which duplicate pre-commit.

Ran pre-commit on the codebase.

app/boards/shields/hummingbird/hummingbird.overlay

@@ -49,7 +49,7 @@
             , <&xiao_d 5 GPIO_ACTIVE_HIGH>
             ;
     };
-    
+
 };
 
 &xiao_spi { status = "disabled"; };