feat: Add pre-commit hooks for code quality checks

Adding pre-commit hooks to the project for performing code quality checks
using pre-commit framework. This includes hooks for trailing whitespace,
end-of-file fixer, YAML validation, and checking added large files. Also
includes hooks from ruff-pre-commit for linting and formatting.

.github/workflows/ruff.yml

@@ -0,0 +1,8 @@
+name: Ruff
+on: [ push, pull_request ]
+jobs:
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: chartboost/ruff-action@v1

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.2.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-added-large-files
+
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    # Ruff version.
+    rev: v0.1.7
+    hooks:
+      # Run the linter.
+      - id: ruff
+        args: [ --fix ]
+      # Run the formatter.
+      - id: ruff-format

pyproject.toml

@@ -80,7 +80,8 @@ testing = [
     # FIXME code not compatible with hikari 2.0.0.dev121
     "hikari-crescent<1.0.0,>=0.6.4",
     "khl-py<1.0.0,>=0.3.17",
-    "slack-bolt<2.0.0,>=1.18.0"
+    "slack-bolt<2.0.0,>=1.18.0",
+    "pre-commit<3.5.0,>=2.15.0",
 ]
 
 [tool.pdm.dev-dependencies]
@@ -94,4 +95,3 @@ includes = ["llmkira"]
 [build-system]
 requires = ["pdm-backend"]
 build-backend = "pdm.backend"
-