fix: include cppbridge library in package build output

Configure CMake to output `libcppbridgeplugin.so` to the package directory and set `$ORIGIN` runtime path so that it is properly bundled and resolved when distributed as a .plasmoid zip archive.

cpp/CMakeLists.txt

@@ -36,4 +36,13 @@ target_link_libraries(cppbridgeplugin PRIVATE
 set_target_properties(cppbridgeplugin PROPERTIES
     CXX_STANDARD 20
     CXX_STANDARD_REQUIRED ON
+    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/../package/contents/ui/cppbridge"
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/../package/contents/ui/cppbridge"
+    BUILD_WITH_INSTALL_RPATH TRUE
+    INSTALL_RPATH "$ORIGIN"
+)
+
+set_target_properties(cppbridgepluginplugin PROPERTIES
+    BUILD_WITH_INSTALL_RPATH TRUE
+    INSTALL_RPATH "$ORIGIN"
 )

cpp/CMakePresets.json

@@ -13,8 +13,8 @@
             "generator": "Unix Makefiles",
             "binaryDir": "${sourceDir}/../build/cpp",
             "cacheVariables": {
-                "CMAKE_C_COMPILER": "clang",
-                "CMAKE_CXX_COMPILER": "clang++",
+                "CMAKE_C_COMPILER": "gcc",
+                "CMAKE_CXX_COMPILER": "g++",
                 "CMAKE_EXPORT_COMPILE_COMMANDS": "ON"
             }
         }