feat(network): integrate protobuf for player sync and session management

Add Protobuf dependency, define proto messages for player requests, positions, and chunk data. Refactor Session to use strand and async write. Implement player join/exit and position sync in ServerWorld.

CMakeLists.txt

@@ -19,6 +19,8 @@ if(MSVC)
 endif()
 
 find_package(OpenGL REQUIRED)
+find_package(Protobuf REQUIRED)
+
 
 if (UNIX AND NOT APPLE)
     find_package(Freetype REQUIRED)
@@ -28,8 +30,7 @@ if (UNIX AND NOT APPLE)
     find_package(glfw3 REQUIRED)   
 endif()
 
-add_library(glad STATIC third_party/glad/src/glad.c
-    src/gameplay/network_client.cpp)
+add_library(glad STATIC third_party/glad/src/glad.c)
 target_include_directories(glad PUBLIC third_party/glad/include)
 
 include(FetchContent)
@@ -99,7 +100,7 @@ FetchContent_MakeAvailable(tomlplusplus)
 
 add_subdirectory(third_party/imgui)
 
-set(INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include)
+
 
 add_executable(${PROJECT_NAME}
     src/main.cpp
@@ -148,8 +149,18 @@ add_executable(${PROJECT_NAME}
     src/gameplay/server_player.cpp
     src/gameplay/client_player.cpp
     src/gameplay/session.cpp
+    src/gameplay/network_client.cpp
+)
+set(PROTO_SOURCES
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/proto/chunk_data.proto
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/proto/player_pos.proto
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/proto/player_request.proto
+)
+protobuf_generate(
+    TARGET ${PROJECT_NAME}           
+    LANGUAGE cpp         
+    PROTOS ${PROTO_SOURCES}
 )
-
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
     message(STATUS "Building with AddressSanitizer enabled for target: ${PROJECT_NAME}")
 
@@ -175,10 +186,13 @@ else()
     )
 endif()
 
-target_include_directories(${PROJECT_NAME} PRIVATE ${INCLUDE_DIR})
+target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/include)
 target_include_directories(${PROJECT_NAME} PRIVATE
     ${CMAKE_SOURCE_DIR}/third_party/asio/include
 )
+
+target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src)
+
 target_compile_definitions(${PROJECT_NAME} PRIVATE
     ASIO_STANDALONE
     ASIO_NO_DEPRECATED
@@ -194,6 +208,7 @@ target_link_libraries(${PROJECT_NAME}
         tomlplusplus::tomlplusplus
         imgui
         tbb
+        protobuf::libprotobuf
 )
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")