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

pkg/can-go/internal/identifiers/case.go

@@ -0,0 +1,17 @@
+package identifiers
+
+import "unicode"
+
+func IsCamelCase(s string) bool {
+	i := 0
+	for _, r := range s {
+		if unicode.IsDigit(r) {
+			continue
+		}
+		if i == 0 && !unicode.IsUpper(r) || !IsAlphaChar(r) && !IsNumChar(r) {
+			return false
+		}
+		i++
+	}
+	return true
+}