Add video stream support

src/modules/camera.c

@@ -0,0 +1,20 @@
+#include "message.h"
+#include "connection.h"
+#include "robomaster.h"
+
+void
+stream_ctrl (
+		union Request* req,
+        uint16_t seq,
+        bool ack,
+		enum STREAMSTATE state,
+		enum STREAMRESOLUTION res,
+		enum STREAMCTRL ctrl ) {
+    req->stream.state = state;
+    req->stream.resolution = res;
+    req->stream.ctrl = ctrl;
+    req->stream.conn_type = 0; // Hardcode to WiFi
+    req_finalize(seq, STREAM_CTRL_CMD, ack, req);
+}
+
+