feat: add Low GPU Accuracy setting for maximum performance

Implements a new "Low" GPU accuracy level that prioritizes performance
over accuracy by aggressively cutting corners in GPU emulation.

Changes:
- Add GpuAccuracy::Low enum and setting infrastructure
- Implement IsGPULevelNormal() helper function
- Skip texture cache checks and query operations
- Use unsafe memory reads for DMA operations
- Disable fence delays and query precision
- Add UI support for desktop (Qt) and Android

Performance optimizations:
- Skips texture cache coherency checks (vk/gl_rasterizer.cpp)
- Non-blocking query synchronization (query_cache.h)
- Unsafe memory operations (dma_pusher.cpp)
- No macro parameter refresh (maxwell_3d.cpp)
- Immediate fence signaling (fence_manager.h)
- Non-precise Vulkan queries (vk_query_cache.cpp)

Ideal for lower-end hardware and users prioritizing FPS over accuracy.
Works on both desktop and Android platforms.

Signed-off-by: Zephyron <zephyron@citron-emu.org>

src/android/app/src/main/res/values/arrays.xml

@@ -74,6 +74,7 @@
     </integer-array>
 
     <string-array name="rendererAccuracyNames">
+        <item>@string/renderer_accuracy_low</item>
         <item>@string/renderer_accuracy_normal</item>
         <item>@string/renderer_accuracy_high</item>
         <item>@string/renderer_accuracy_extreme</item>
@@ -83,6 +84,7 @@
         <item>0</item>
         <item>1</item>
         <item>2</item>
+        <item>3</item>
     </integer-array>
 
     <string-array name="rendererResolutionNames">

src/android/app/src/main/res/values/strings.xml

@@ -610,6 +610,7 @@
     <string name="renderer_none">None</string>
 
     <!-- Renderer Accuracy -->
+    <string name="renderer_accuracy_low">Low</string>
     <string name="renderer_accuracy_normal">Normal</string>
     <string name="renderer_accuracy_high">High</string>
     <string name="renderer_accuracy_extreme">Extreme (Slow)</string>