chore(pre-commit): add hooks for spell and lint

.pre-commit-config.yaml

+repos:
+  - repo: https://github.com/codespell-project/codespell
+    rev: v2.2.5
+    hooks:
+      - id: codespell
+        args: []
+  - repo: local
+    hooks:
+      - id: liquidsoap-check
+        name: liquidsoap-check
+        entry: sh -c 'liquidsoap --check src/engine.liq'
+        language: system

Makefile

@@ -62,13 +62,16 @@ spell::
 	codespell $(wildcard *.md) docs src tests config contrib
 
 init.app::
-	cp -n config/sample.engine-core.ini config/engine-core.ini
+	cp -n config/sample.engine-core.ini config/engine-core.ini || true
 	mkdir -p audio/fallback
 	mkdir -p audio/playlist
 	mkdir -p audio/source
 
 init.dev:: init.app
 	sudo apt install -y codespell
+	sudo apt install -y pre-commit
+	pre-commit autoupdate
+	pre-commit install
 
 test::
 	(cd tests && liquidsoap engine_test_suite.liq)