feat(meshtastic): extract LoBBS plugin library

protocol/machine/serialize.cpp

@@ -0,0 +1,26 @@
+#if !MESHTASTIC_EXCLUDE_LOBBS
+
+#include "serialize.h"
+#include <cstddef>
+
+#include "LoBBSStackGuard.h"
+
+bool lobbsSerializeMachine(const LoBBSResponse &resp, std::string &out)
+{
+    out.clear();
+    if (!resp.ok) {
+        out = resp.error;
+        return true;
+    }
+    for (const LoScalar &rec : resp.records) {
+        if (!out.empty())
+            out.push_back('\n');
+        std::string line;
+        if (!rec.encode(line, SIZE_MAX))
+            return false;
+        out += line;
+    }
+    return true;
+}
+
+#endif