chore: enable pre-commit for commit linting

Give developers a local to verify commit messages before entering the
longer CI roundtrip.

Author: languitar

.pre-commit-config.yaml

@@ -0,0 +1,12 @@
+---
+default_install_hook_types:
+  - pre-commit
+  - commit-msg
+repos:
+  - repo: https://github.com/alessandrojcm/commitlint-pre-commit-hook
+    rev: v9.4.0
+    hooks:
+      - id: commitlint
+        stages: [commit-msg]
+        additional_dependencies: ["@commitlint/config-angular"]
+        args: ["--config", "./commitlint.config.js"]

README.md

@@ -1,2 +1,19 @@
 # modelix.core
+
 All the Modelix components that don't have a dependency on JetBrains MPS
+
+## Development
+
+### Commit convention
+
+This project uses [conventional commits 1.0.0](https://www.conventionalcommits.org/en/v1.0.0/) as the convention for Git commits.
+
+### pre-commit
+
+This project uses [pre-commit](https://pre-commit.com/) to validate that new commits follow intended conventions.
+To enable pre-commit hooks, you have to run the following command initially after cloning the repository:
+
+```console
+$ pre-commit install
+pre-commit installed at .git/hooks/pre-commit
+```