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.

.github/workflows/doc-checks.yml

@@ -21,16 +21,6 @@ jobs:
       - name: ESLint
         run: npm run lint
         working-directory: docs
-  prettier:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: bahmutov/npm-install@v1
-        with:
-          working-directory: docs
-      - name: Prettier check
-        run: npm run prettier:check
-        working-directory: docs
   typecheck:
     runs-on: ubuntu-latest
     steps: