[desktop] Add basic Frametime/FPS overlay (#3537)

Just displays min, max, avg frametime/fps, alongside a chart of FPS in
the last 30 seconds.

Notes:
- Qt Charts is now required
- FPS/frametime collector now runs 2x as often. TODO: keep status bar at
  500ms, but put perf overlay at 250ms

Signed-off-by: crueter <crueter@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3537
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/yuzu/main.ui

@@ -146,6 +146,7 @@
     <addaction name="action_Enable_Overlay_Applet"/>
     <addaction name="action_Show_Filter_Bar"/>
     <addaction name="action_Show_Status_Bar"/>
+    <addaction name="action_Show_Performance_Overlay"/>
     <addaction name="separator"/>
     <addaction name="menu_Reset_Window_Size"/>
     <addaction name="menu_View_Debugging"/>
@@ -611,6 +612,14 @@
     <string>Show Game &amp;Name</string>
    </property>
   </action>
+  <action name="action_Show_Performance_Overlay">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Show &amp;Performance Overlay</string>
+   </property>
+  </action>
  </widget>
  <resources>
   <include location="yuzu.qrc"/>