lang(Bulgarian): Add Bulgarian to the application

Author: Belphemur

SoundSwitch/Localization/Factory/Lang/Langs.cs

@@ -255,4 +255,14 @@ public class Ukrainian : BaseLang
 
         public override Language TypeEnum => Language.Ukrainian;
     }
+    
+    public class Bulgarian : BaseLang
+    {
+        /// <summary>
+        /// Culture info of this language
+        /// </summary>
+        public override CultureInfo CultureInfo => CultureInfo.GetCultureInfo("bg");
+
+        public override Language TypeEnum => Language.Bulgarian;
+    }
 }

SoundSwitch/Localization/Factory/Language.cs

@@ -43,6 +43,7 @@ public enum Language
         Thai,
         Serbian,
         Danish,
-        Ukrainian
+        Ukrainian,
+        Bulgarian
     }
 }

SoundSwitch/Localization/Factory/LanguageFactory.cs

@@ -33,7 +33,8 @@ public LanguageFactory() : base(new EnumImplList<Language, ILang>
             new Thai(),
             new Serbian(),
             new Danish(),
-            new Ukrainian()
+            new Ukrainian(),
+            new Bulgarian()
         })
         {
         }