Introduce pre-commit configuration (#280)

* Introduce pre-commit configuration

* Add docs

Author: bgunebakan

.pre-commit-config.yaml

@@ -0,0 +1,10 @@
+repos:
+  # Mirrors CI: poe lint → `ruff format --check` + `ruff check .`
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.15.13
+    hooks:
+      - id: ruff
+        exclude: ^bin/
+      - id: ruff-format
+        exclude: ^bin/
+

DEVELOP.md

@@ -32,6 +32,19 @@ Format code:
 
     poe format
 
+## Pre-commit hooks
+
+The repository ships a `.pre-commit-config.yaml` that runs the same linters
+as CI (`ruff check` + `ruff format --check`) on every commit. To install:
+
+    pip install pre-commit
+    pre-commit install
+
+After that, linting runs automatically before each `git commit`. To run it
+manually across all files:
+
+    pre-commit run --all-files
+
 
 ## Preparing a release