Implement Plugin Loading.

This commit adds plugin laoding which are then added as sub winows onto the main window.
This commit also adds 2 plugins however more will follow

plugins/WebBrowserPlugin/CMakeLists.txt

@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.16)
+project(WebBrowserPlugin VERSION 1.0 LANGUAGES C CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+include(GNUInstallDirs)
+
+find_package(QT NAMES Qt6 REQUIRED COMPONENTS Core)
+find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Gui WebEngineWidgets Widgets)
+
+qt_add_plugin(WebBrowserPlugin)
+target_sources(WebBrowserPlugin PRIVATE
+    WebBrowserPlugin.cpp WebBrowserPlugin.h
+)
+
+target_link_libraries(WebBrowserPlugin PRIVATE
+    Qt::Core
+    Qt::Gui
+    Qt::WebEngineWidgets
+    Qt::Widgets
+)