add: spdlog and basic client code.

ClientCore/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(ClientCore LANGUAGES CXX)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core Network)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core Network)
+
+set(SOURCES
+ClientCore.cpp
+ClientCore.h
+)
+
+add_library(ClientCore STATIC ${SOURCES})
+target_link_libraries(ClientCore PRIVATE Protocol 
+    Qt${QT_VERSION_MAJOR}::Core 
+    Qt${QT_VERSION_MAJOR}::Network
+)
+target_include_directories(ClientCore PUBLIC ${CMAKE_CURRENT_LIST_DIR})