- 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/Common/PubSub/TypedKey.cs

@@ -5,9 +5,7 @@ public readonly struct TypedKey<TData>
     public readonly string Key;
 
     public TypedKey(in string key)
-    {
-        Key = key;
-    }
+        => Key = key;
 
     public static implicit operator TypedKey<TData>(in string input)
         => new(input);