ENH: Update pre-commit config to include "trailing-whitespace"

By adding `trailing-whitespace` to the pre-commit configuration, it enables the following:
* GitHub Action report: Suggested changes are reported in the error log associated with the pre-commit GitHub Action workflow.
* Consolidated local pre-commit checks and updates by running:

  ```
  python -m pip install pyupgrade

  python -m pre_commit run --all-files
  ```

.pre-commit-config.yaml

@@ -7,3 +7,5 @@ repos:
   - id: check-case-conflict
   - id: check-merge-conflict
   - id: check-symlinks
+  - id: trailing-whitespace
+    exclude: "\\.(svg|vtk|vtp)$"