feat: Implement 32:9 aspect ratio

This commit introduces support for a 32:9 aspect ratio throughout Citron.

Key changes include:

-   **Enum Updates**: Added `R32_9` to `Settings::AspectRatio` and `Layout::AspectRatio` enums, ensuring consistent integer mapping for casting between them.
-   **Core Logic**:
    -   Modified `UISettings::CalculateWidth` to correctly compute width for the 32:9 ratio.
    -   Updated `Layout::EmulationAspectRatio` to handle the new `R32_9` case and return the appropriate float value (9.0f / 32.0f).
-   **Android Integration**:
    -   Updated `EmulationFragment.kt` and `EmulationActivity.kt` (for Picture-in-Picture) to recognize and apply the 32:9 aspect ratio (mapping setting value `4` to `Rational(32, 9)`).
-   **UI Configuration**:
    -   Added "Force 32:9" to the aspect ratio selection in the graphics settings UI via `shared_translation.cpp`. This string is translatable.

This enhancement allows users to utilize ultra-widescreen 32:9 displays for a more immersive experience.

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

src/citron/uisettings.cpp

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: 2016 Citra Emulator Project
+// SPDX-FileCopyrightText: Copyright 2025 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <QSettings>
@@ -47,6 +48,8 @@ u32 CalculateWidth(u32 height, Settings::AspectRatio ratio) {
         return height * 21 / 9;
     case Settings::AspectRatio::R16_10:
         return height * 16 / 10;
+    case Settings::AspectRatio::R32_9:
+        return height * 32 / 9;
     case Settings::AspectRatio::R16_9:
     case Settings::AspectRatio::Stretch:
         // TODO: Move this function wherever appropriate to implement Stretched aspect