[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.

host/include/interface/capture.h

@@ -22,13 +22,9 @@
 
 #include <stdbool.h>
 #include <stdint.h>
-#include "common/KVMFR.h"
+#include <LGProtocol/KVMFR.h>
 
-#ifdef __cplusplus
-/* using common/framebuffer.h breaks compatibillity with C++ due to it's usage
- * of stdatomic.h, so we need to forward declare the structure here */
-typedef struct stFrameBuffer FrameBuffer;
-#else
+#ifndef __cplusplus
 #include "common/framebuffer.h"
 #endif
 
@@ -95,8 +91,8 @@ typedef struct CaptureFrame
   uint32_t        hdrMaxFrameAverageLightLevel;
   uint32_t        sdrWhiteLevel;
 
-  uint32_t        damageRectsCount;
-  FrameDamageRect damageRects[KVMFR_MAX_DAMAGE_RECTS];
+  uint32_t             damageRectsCount;
+  KVMFRFrameDamageRect damageRects[KVMFR_MAX_DAMAGE_RECTS];
 
   // Producer-local durations. Absolute timestamps must not cross KVMFR as the
   // client and producer use different monotonic clock domains.
@@ -148,18 +144,18 @@ typedef struct CaptureInterface
   void          (*free         )(void);
 
   CaptureResult (*capture   )(
-    unsigned frameBufferIndex,
-    FrameBuffer * frame);
+    unsigned           frameBufferIndex,
+    KVMFRFrameBuffer * frame);
   CaptureResult (*waitFrame )(
-    unsigned frameBufferIndex,
-    CaptureFrame * frame,
-    /* Capacity of FrameBuffer::data, excluding the message and header. */
-    const size_t maxFrameSize);
-  CaptureResult (*getFrame  )(
     unsigned       frameBufferIndex,
-    FrameBuffer  * frame,
-    /* Capacity of FrameBuffer::data, excluding the message and header. */
-    const size_t   maxFrameSize,
-    CaptureFrame * captureFrame);
+    CaptureFrame * frame,
+    /* Capacity of KVMFRFrameBuffer::data, excluding message and header. */
+    const size_t   maxFrameSize);
+  CaptureResult (*getFrame  )(
+    unsigned           frameBufferIndex,
+    KVMFRFrameBuffer * frame,
+    /* Capacity of KVMFRFrameBuffer::data, excluding message and header. */
+    const size_t       maxFrameSize,
+    CaptureFrame     * captureFrame);
 }
 CaptureInterface;

host/include/interface/platform.h

@@ -21,7 +21,7 @@
 #pragma once
 
 #include <stdbool.h>
-#include "common/KVMFR.h"
+#include <LGProtocol/KVMFR.h>
 
 // exit code for user opted to exit looking-glass-host
 #define LG_HOST_EXIT_USER    0x10