cleaned up and improved GameOptions Model & Page

- added array support
- cleaned up logic
- ran clang-format
- added description & default value columns
- added basic editing support (bools only) - no saving

Co-authored-by: TheLastRar <TheLastRar@users.noreply.github.com>
Signed-off-by: Tayou <tayou@gmx.net>

launcher/ui/pages/instance/GameOptionsPage.ui

@@ -66,7 +66,7 @@
           </size>
          </property>
          <property name="rootIsDecorated">
-          <bool>false</bool>
+          <bool>true</bool>
          </property>
          <attribute name="headerStretchLastSection">
           <bool>false</bool>