chores: add isort and mypy to our tests

Author: tngraf

RunChecks.ps1

@@ -5,14 +5,20 @@
 # SPDX-License-Identifier: MIT
 # ---------------------------------------------
 
-# 2022-07-15, T. Graf
+# 2023-12-25, T. Graf
 
 Write-Host "flake8 ..."
 poetry run flake8
 
 Write-Host "markdownlint ..."
 npx -q markdownlint-cli *.md
 
+Write-Host "isort ..."
+isort .
+
+Write-Host "mypy ..."
+mypy .
+
 Write-Host "done."