impr: Get rid of cimgui shared library by hooking pinvoke handler

lib/libimhex/include/hex/api/imhex_api.hpp

@@ -664,6 +664,12 @@ namespace hex {
              */
             std::optional<InitialWindowProperties> getInitialWindowProperties();
 
+            /**
+             * @brief Gets the module handle of libimhex
+             * @return Module handle
+             */
+            void* getLibImHexModuleHandle();
+
         }
 
         /**