- 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/Db/Models/UnroleTimer.cs

@@ -10,9 +10,7 @@ public class UnroleTimer : DbEntity
         UserId.GetHashCode() ^ RoleId.GetHashCode();
 
     public override bool Equals(object obj)
-    {
-        return obj is UnroleTimer ut
+        => obj is UnroleTimer ut
             ? ut.UserId == UserId && ut.RoleId == RoleId
             : false;
-    }
 }