chores: be more verbose while running checks

RunChecks.ps1

@@ -2,13 +2,21 @@
 # Run quality checks
 # ------------------
 
-# 2023-12-24, T. Graf
+# 2024-05-07, T. Graf
 
+Write-Host "flake8 ..."
 poetry run flake8
+
+Write-Host "markdownlint ..."
 npx -q markdownlint-cli *.md
+
+Write-Host "isort ..."
 poetry run isort .
+
+Write-Host "mypy ..."
 poetry run mypy .
 
+Write-Host "Done."
 
 # -----------------------------------
 # -----------------------------------