Standardize on ruff for both linting and formatting

- Remove black from pre-commit configuration
- Update Makefile to use 'ruff format' instead of 'black'
- Add formatting check to CI workflow
- Update ruff pre-commit hook to latest version (v0.6.0)
- Update documentation to reflect ruff-only approach
- Ensure consistent code formatting across local dev and CI

This eliminates potential conflicts between black and ruff formatting
and simplifies the toolchain to use ruff for everything.

Author: michael-borck

.github/workflows/ci.yml

@@ -35,6 +35,10 @@ jobs:
       run: |
         basedpyright
     
+    - name: Run formatting check
+      run: |
+        ruff format --check .
+    
     - name: Run linting
       run: |
         ruff check .

.pre-commit-config.yaml

@@ -12,18 +12,12 @@ repos:
       - id: detect-private-key
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.1.9
+    rev: v0.6.0
     hooks:
       - id: ruff
         args: [--fix]
       - id: ruff-format
 
-  - repo: https://github.com/psf/black
-    rev: 23.12.1
-    hooks:
-      - id: black
-        language_version: python3.11
-
   - repo: local
     hooks:
       - id: basedpyright

CONTRIBUTING.md

@@ -55,7 +55,8 @@ Thank you for your interest in contributing to Curriculum Curator! This document
 - Follow PEP 8
 - Use type hints where possible
 - Maximum line length: 100 characters
-- Use `ruff` for linting and formatting
+- Use `ruff` for both linting and formatting (no `black`)
+- Format code before committing: `ruff format .`
 
 ### Commit Messages
 Follow conventional commits format:

Makefile

@@ -40,7 +40,7 @@ type-check:
 	python scripts/check_types.py
 
 format:
-	black .
+	ruff format .
 	ruff check . --fix
 
 # Combined checks

scripts/README.md

@@ -54,6 +54,14 @@ python scripts/check_types.py
 
 1. **Start development server**: `python scripts/run_dev.py`
 2. **Make changes** to code
-3. **Run tests**: `python scripts/run_tests.py`
-4. **Check types**: `python scripts/check_types.py`
-5. **Commit** when all checks pass
+3. **Format code**: `ruff format .` (or `make format`)
+4. **Run tests**: `python scripts/run_tests.py`
+5. **Check types**: `python scripts/check_types.py`
+6. **Commit** when all checks pass
+
+## Code Quality Tools
+
+We use `ruff` for both linting and formatting:
+- **Format**: `ruff format .`
+- **Lint**: `ruff check . --fix`
+- **Combined**: `make format` or `make check-all`