refactor(cmake): split CMakeLists into modules (#1587)

cmake/packaging/common.cmake

@@ -0,0 +1,32 @@
+# common packaging
+
+# common cpack options
+set(CPACK_PACKAGE_NAME ${CMAKE_PROJECT_NAME})
+set(CPACK_PACKAGE_VENDOR "LizardByte")
+set(CPACK_PACKAGE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/cpack_artifacts)
+set(CPACK_PACKAGE_CONTACT "https://app.lizardbyte.dev")
+set(CPACK_PACKAGE_DESCRIPTION ${CMAKE_PROJECT_DESCRIPTION})
+set(CPACK_PACKAGE_HOMEPAGE_URL ${CMAKE_PROJECT_HOMEPAGE_URL})
+set(CPACK_RESOURCE_FILE_LICENSE ${PROJECT_SOURCE_DIR}/LICENSE)
+set(CPACK_PACKAGE_ICON ${PROJECT_SOURCE_DIR}/sunshine.png)
+set(CPACK_PACKAGE_FILE_NAME "${CMAKE_PROJECT_NAME}")
+set(CPACK_STRIP_FILES YES)
+
+# install npm modules
+install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/node_modules"
+        DESTINATION "${SUNSHINE_ASSETS_DIR}/web")
+
+# platform specific packaging
+if(WIN32)
+    include(${CMAKE_MODULE_PATH}/packaging/windows.cmake)
+elseif(UNIX)
+    include(${CMAKE_MODULE_PATH}/packaging/unix.cmake)
+
+    if(APPLE)
+        include(${CMAKE_MODULE_PATH}/packaging/macos.cmake)
+    else()
+        include(${CMAKE_MODULE_PATH}/packaging/linux.cmake)
+    endif()
+endif()
+
+include(CPack)