[repos] lgprotocol: import shared protocol definitions

Add LGProtocol as a pinned submodule and consume its KVMFR protocol
definitions throughout the client, host, IDD, OBS, and profiler.

Keep Looking Glass framebuffer helpers local while removing duplicated
protocol headers and migrating users to KVMFR-scoped types.

client/tests/desktop_rects_test.c

@@ -46,14 +46,14 @@ static void testRotations(void)
     { .x = 140, .y = 10, .w = 40, .h = 20 },
     { .x =  20, .y = 10, .w = 40, .h = 20 },
   };
-  const FrameDamageRect damage =
+  const KVMFRFrameDamageRect damage =
   {
     .x      = 10,
     .y      = 5,
     .width  = 20,
     .height = 10,
   };
-  const FrameDamageRect full =
+  const KVMFRFrameDamageRect full =
   {
     .width  = 100,
     .height = 50,
@@ -79,7 +79,7 @@ static void testFractional(void)
   double matrix[6];
   egl_desktopToScreenMatrix(matrix, 3, 2, 0.0, 0.0, 1.0, 1.0,
       LG_ROTATE_0, 10.0, 7.0);
-  const FrameDamageRect damage =
+  const KVMFRFrameDamageRect damage =
   {
     .x      = 1,
     .width  = 1,
@@ -90,7 +90,7 @@ static void testFractional(void)
 
   egl_desktopToScreenMatrix(matrix, 100, 50, 0.1, -0.2, 0.5, 0.75,
       LG_ROTATE_0, 10.0, 7.0);
-  const FrameDamageRect full =
+  const KVMFRFrameDamageRect full =
   {
     .width  = 100,
     .height = 50,
@@ -101,7 +101,7 @@ static void testFractional(void)
 
 static void testRoundTrip(void)
 {
-  const FrameDamageRect damage =
+  const KVMFRFrameDamageRect damage =
   {
     .x      = 10,
     .y      = 5,
@@ -119,7 +119,7 @@ static void testRoundTrip(void)
         (LG_RendererRotate)i, 200.0, 100.0);
 
     const struct Rect screen = egl_desktopToScreen(forward, &damage);
-    FrameDamageRect result;
+    KVMFRFrameDamageRect result;
     CHECK(egl_screenToDesktop(&result, inverse, &screen, 100, 50));
     CHECK(result.x <= damage.x);
     CHECK(result.y <= damage.y);
@@ -141,7 +141,7 @@ static void testClipping(void)
     .w = 10,
     .h = 10,
   };
-  FrameDamageRect result;
+  KVMFRFrameDamageRect result;
   CHECK(!egl_screenToDesktop(&result, matrix, &outside, 100, 50));
 
   const struct Rect edge =