build: require all plugins that builtint depends on to be present

cmake/build_helpers.cmake

@@ -611,9 +611,13 @@ macro(detectBundledPlugins)
         message(FATAL_ERROR "No bundled plugins enabled")
     endif()
 
-    if (NOT ("builtin" IN_LIST PLUGINS))
-        message(FATAL_ERROR "The 'builtin' plugin is required for ImHex to work!")
-    endif ()
+    set(REQUIRED_PLUGINS builtin fonts ui)
+    foreach(PLUGIN ${REQUIRED_PLUGINS})
+        list(FIND PLUGINS ${PLUGIN} PLUGIN_INDEX)
+        if (PLUGIN_INDEX EQUAL -1)
+            message(FATAL_ERROR "Required plugin '${PLUGIN}' is not enabled!")
+        endif()
+    endforeach()
 endmacro()
 
 macro(setVariableInParent variable value)