chore: add CI, pre-commit, dependabot, and codeql workflows for automated code quality and security checks

.pre-commit-config.yaml

@@ -0,0 +1,21 @@
+# Pre-commit hooks for djinit
+
+default_language_version:
+  python: python3.13
+
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.1.4
+    hooks:
+      - id: ruff
+        args: [--fix, --exit-non-zero-on-fix]
+      - id: ruff-format
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+