add some more pre-commit checks

- added-large-files
- merge-conflict
- private-key

Author: sebhmg

.pre-commit-config.yaml

@@ -33,3 +33,6 @@ repos:
         exclude_types: [jupyter]
       - id: check-toml
       - id: check-yaml
+      - id: check-added-large-files
+      - id: check-merge-conflict
+      - id: detect-private-key