Add inverted punctuation marks to Quick Accent for Spanish and Catalan

When using Spanish or Catalan language in Quick Accent:
- Pressing '1' + activation key now shows '' (inverted exclamation mark)
- Pressing '/' + activation key now shows '' (inverted question mark)

This makes it easier to type Spanish/Catalan punctuation without needing
to remember the VK_COMMA shortcut that shows all four marks.

The existing VK_COMMA behavior (showing ?!) is preserved for users who
prefer that method.

Fixes #20618

Author: ThanhNguyxn

src/modules/poweraccent/PowerAccent.Core/Languages.cs

@@ -385,6 +385,7 @@ private static string[] GetDefaultLetterKeySP(LetterKey letter)
         {
             return letter switch
             {
+                LetterKey.VK_1 => new[] { "¡" },
                 LetterKey.VK_A => new[] { "á" },
                 LetterKey.VK_E => new[] { "é", "€" },
                 LetterKey.VK_H => new[] { "ḥ" },
@@ -393,6 +394,7 @@ private static string[] GetDefaultLetterKeySP(LetterKey letter)
                 LetterKey.VK_N => new[] { "ñ" },
                 LetterKey.VK_O => new[] { "ó" },
                 LetterKey.VK_U => new[] { "ú", "ü" },
+                LetterKey.VK_SLASH_ => new[] { "¿" },
                 LetterKey.VK_COMMA => new[] { "¿", "?", "¡", "!" },
                 _ => Array.Empty<string>(),
             };
@@ -403,6 +405,7 @@ private static string[] GetDefaultLetterKeyCA(LetterKey letter)
         {
             return letter switch
             {
+                LetterKey.VK_1 => new[] { "¡" },
                 LetterKey.VK_A => new[] { "à", "á" },
                 LetterKey.VK_C => new[] { "ç" },
                 LetterKey.VK_E => new[] { "è", "é", "€" },
@@ -411,6 +414,7 @@ private static string[] GetDefaultLetterKeyCA(LetterKey letter)
                 LetterKey.VK_O => new[] { "ò", "ó" },
                 LetterKey.VK_U => new[] { "ù", "ú", "ü" },
                 LetterKey.VK_L => new[] { "·" },
+                LetterKey.VK_SLASH_ => new[] { "¿" },
                 LetterKey.VK_COMMA => new[] { "¿", "?", "¡", "!" },
                 _ => Array.Empty<string>(),
             };