MoQT Framer. Turns structured message data into the wire image.

PiperOrigin-RevId: 569530523
diff --git a/build/source_list.json b/build/source_list.json
index 4db9bc0..fdff71e 100644
--- a/build/source_list.json
+++ b/build/source_list.json
@@ -1479,11 +1479,14 @@
     "quiche/quic/load_balancer/load_balancer_server_id_test.cc"
   ],
   "moqt_hdrs": [
+    "quiche/quic/moqt/moqt_framer.h",
     "quiche/quic/moqt/moqt_messages.h",
     "quiche/quic/moqt/moqt_parser.h",
     "quiche/quic/moqt/test_tools/moqt_test_message.h"
   ],
   "moqt_srcs": [
+    "quiche/quic/moqt/moqt_framer.cc",
+    "quiche/quic/moqt/moqt_framer_test.cc",
     "quiche/quic/moqt/moqt_messages.cc",
     "quiche/quic/moqt/moqt_parser.cc",
     "quiche/quic/moqt/moqt_parser_test.cc"