test: Add flagsmith-lint-tests pre-commit hook with example violation

Author: khvn26

.pre-commit-config.yaml

@@ -43,6 +43,11 @@ repos:
         types: [python]
         stages: [pre-push]
 
+  - repo: https://github.com/Flagsmith/flagsmith-common
+    rev: feat/lint-tests-ft-rules
+    hooks:
+      - id: flagsmith-lint-tests
+
   - repo: https://github.com/python-poetry/poetry
     rev: 2.3.2
     hooks:

api/tests/unit/core/test_unit_core_example.py

@@ -0,0 +1,5 @@
+"""Example test that violates flagsmith-lint-tests rules."""
+
+
+def test_example_bad_naming() -> None:
+    assert 1 + 1 == 2