Add a pre-commit config

This makes sure a bunch of things are executed on git commit so things
like python ruff and others run before even pushing.

Activate locally with `pre-commit install`, it's not activated by
default.

.pre-commit-config.yaml

@@ -0,0 +1,13 @@
+repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v4.6.0
+  hooks:
+  - id: end-of-file-fixer
+  - id: trailing-whitespace
+  - id: check-merge-conflict
+  - id: check-symlinks
+- repo: https://github.com/charliermarsh/ruff-pre-commit
+  rev: v0.4.3
+  hooks:
+  - id: ruff
+    args: ['--ignore=E741,E501']