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

pkg/can-go/internal/generate/file_test.go

@@ -0,0 +1,18 @@
+package generate
+
+import (
+	"os"
+	"testing"
+
+	"gotest.tools/v3/assert"
+)
+
+func runTestInDir(t *testing.T, dir string) func() {
+	// change working directory to project root
+	wd, err := os.Getwd()
+	assert.NilError(t, err)
+	assert.NilError(t, os.Chdir(dir))
+	return func() {
+		assert.NilError(t, os.Chdir(wd))
+	}
+}