build: 🔧 add mypy config (#89)

# Description

This PR adds the same mypy config as in Sprout. I hope this is
everything!

Closes #88 

This PR needs a quick review.

## Checklist

- [x] Added or updated tests
- [x] Updated documentation

Author: martonvago

.github/sync.yml

@@ -21,6 +21,8 @@ group:
         dest: LICENSE.md
       - source: .github/pull_request_template.md
         dest: .github/pull_request_template.md
+      - source: mypy.ini
+        dest: mypy.ini
 
       # Actions
       - source: .github/workflows/add-to-project.yml

justfile

@@ -25,9 +25,12 @@ test-python:
     -i coverage.xml \
     -o htmlcov/coverage.svg
 
-# Check Python code with the linter for any errors that need manual attention
+# Check Python code for any errors that need manual attention
 check-python:
+  # Check formatting
   uv run ruff check .
+  # Check types
+  uv run mypy .
 
 # Reformat Python code to match coding style and general structure
 format-python:

mypy.ini

@@ -0,0 +1,5 @@
+[mypy]
+python_version = 3.12
+
+[mypy-quartodoc.*]
+ignore_missing_imports = True