replace the old pre-commit workflows with pre-commit.ci (#69)

* delete the old linting workflows

* "configure" `pre-commit.ci`

Author: keewis

.github/workflows/linting.yaml

@@ -1,3 +1,6 @@
+ci:
+  autoupdate_schedule: "weekly"
+
 # https://pre-commit.com/
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks