Refactor kafka to pure Go (franz-go), fix DBC stubs, update Dockerfile

pkg/can-go/tools/commitlint/.commitlintrc.js

@@ -0,0 +1,8 @@
+module.exports = {
+  extends: ['@commitlint/config-conventional'],
+  rules: {
+    // Treat as warning until Dependabot supports commitlint.
+    // https://github.com/dependabot/dependabot-core/issues/2445
+    "body-max-line-length": [1, "always", 100],
+  }
+};