Run mypy checks in test workflow and on push (via pre-commit)

- Run mypy on git push (not every commit) but for all files
  - Running it on pre-commit, doesn't make sense as mypy wants to look
    at all files, not just diff files
  - But this is too time consuming to run every commit, so run on push

- Update development section documentation on installing, manually
  running pre-commit for validation that includes running mypy checks

.github/workflows/test.yml

@@ -50,7 +50,7 @@ jobs:
         run: pip install --upgrade .[dev]
 
       - name: Validate Application
-        run: pre-commit
+        run: pre-commit run --hook-stage manual --all
 
       - name: Test Application
         run: pytest