- More code cleanup and codestyle updates

- Fixed some possible nullref exceptions
- Methods signatures now have up to 3 parameters before breakaing down each parameter in a separate line
- Method invocations have the same rule, except the first parameter will be in the same line as the invocation to prevent some ugliness when passing lambas as arguments
- Applied many more codestyles
- Extensions folder fully reformatted

src/NadekoBot/Modules/Gambling/Gambling.cs

@@ -201,9 +201,7 @@ public partial class Gambling : GamblingModule<GamblingService>
     [NadekoCommand, Aliases]
     [Priority(0)]
     public async Task Cash(ulong userId)
-    {
-        await ReplyConfirmLocalizedAsync(strs.has(Format.Code(userId.ToString()), $"{GetCurrency(userId)}"));
-    }
+        => await ReplyConfirmLocalizedAsync(strs.has(Format.Code(userId.ToString()), $"{GetCurrency(userId)}"));
 
     [NadekoCommand, Aliases]
     [Priority(1)]