build: Restructured entire custom plugin system (#1469)

cmake/sdk/CMakeLists.txt

@@ -0,0 +1,43 @@
+cmake_minimum_required(VERSION 3.20)
+project(ImHexSDK)
+
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules")
+include("${CMAKE_CURRENT_SOURCE_DIR}/cmake/build_helpers.cmake")
+
+set(IMHEX_BASE_FOLDER ${CMAKE_CURRENT_SOURCE_DIR} PARENT_SCOPE)
+include(ImHexPlugin)
+
+function(add_subdirectory_if_exists folder)
+    if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${folder}/CMakeLists.txt")
+        add_subdirectory("${folder}")
+    endif()
+endfunction()
+
+set(IMHEX_EXTERNAL_PLUGIN_BUILD ON)
+add_custom_target(imhex_all)
+
+add_subdirectory(lib/third_party/imgui)
+add_subdirectory_if_exists(lib/third_party/fmt)
+add_subdirectory_if_exists(lib/third_party/nlohmann_json)
+
+add_subdirectory(lib/external/libwolv)
+
+set(LIBPL_BUILD_CLI_AS_EXECUTABLE OFF)
+add_subdirectory(lib/external/pattern_language)
+
+add_subdirectory(lib/libimhex)
+
+if (WIN32)
+    set_target_properties(libimhex PROPERTIES
+            IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_DIR}/lib/libimhex.dll"
+            IMPORTED_IMPLIB "${CMAKE_CURRENT_SOURCE_DIR}/lib/liblibimhex.dll.a"
+            INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_CURRENT_SOURCE_DIR}/lib/libimhex/include")
+elseif (APPLE)
+    set_target_properties(libimhex PROPERTIES
+            IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_DIR}/lib/libimhex.dylib"
+            INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_CURRENT_SOURCE_DIR}/lib/libimhex/include")
+else()
+    set_target_properties(libimhex PROPERTIES
+            IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_DIR}/lib/libimhex.so"
+            INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_CURRENT_SOURCE_DIR}/lib/libimhex/include")
+endif()