chore: enforce conventional commits and lint via commitlint (#788)

Co-authored-by: pat-s <patrick.schratz@gmail.com>
Co-committed-by: pat-s <patrick.schratz@gmail.com>

.commitlintrc.json

@@ -0,0 +1,7 @@
+{
+  "extends": ["@commitlint/config-conventional"],
+  "rules": {
+    "type-enum": [2, "always", ["feat", "fix", "chore", "docs", "style", "refactor", "test", "perf", "ci", "WIP"]],
+    "type-case": [0, "always", "lower-case"]
+  }
+}