Merge branch 'pre-commit-hooks' into 'master'

Add pre-commit hooks

See merge request !27

.pre-commit-config.yaml

+repos:
+  - repo: local
+    hooks:
+    - id: maven-compile
+      name: Compile with Maven
+      description: Compile all code with mvn compile
+      entry: mvn
+      args:
+        - compile
+      language: system
+      pass_filenames: false
+      types: [java]
+