- 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/Extensions/ClubExtensions.cs

@@ -34,12 +34,10 @@ public static class ClubExtensions
             .Max() + 1;
 
     public static List<ClubInfo> GetClubLeaderboardPage(this DbSet<ClubInfo> clubs, int page)
-    {
-        return clubs
+        => clubs
             .AsNoTracking()
             .OrderByDescending(x => x.Xp)
             .Skip(page * 9)
             .Take(9)
             .ToList();
-    }
 }