Fully reverse swkbd configuration structure and follow-up to swkbd implementation (#839)

* am: Fully reverse swkbd configuration structure

* Add documentation

* Remove explicit access modifiers

* Fix formatting

* Fix further formatting issues

Ryujinx.HLE/HOS/Applets/SoftwareKeyboard/KeyboardMode.cs

@@ -0,0 +1,28 @@
+namespace Ryujinx.HLE.HOS.Applets.SoftwareKeyboard
+{
+    /// <summary>
+    /// Identifies the variant of keyboard displayed on screen.
+    /// </summary>
+    enum KeyboardMode : uint
+    {
+        /// <summary>
+        /// A full alpha-numeric keyboard.
+        /// </summary>
+        Default,
+
+        /// <summary>
+        /// Number pad.
+        /// </summary>
+        NumbersOnly,
+
+        /// <summary>
+        /// QWERTY (and variants) keyboard only.
+        /// </summary>
+        LettersOnly,
+
+        /// <summary>
+        /// Unknown keyboard variant.
+        /// </summary>
+        Unknown
+    }
+}