- 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/CurrencyTransactionExtensions.cs

@@ -6,13 +6,11 @@ namespace NadekoBot.Db;
 public static class CurrencyTransactionExtensions
 {
     public static List<CurrencyTransaction> GetPageFor(this DbSet<CurrencyTransaction> set, ulong userId, int page)
-    {
-        return set.AsQueryable()
+        => set.AsQueryable()
             .AsNoTracking()
             .Where(x => x.UserId == userId)
             .OrderByDescending(x => x.DateAdded)
             .Skip(15 * page)
             .Take(15)
             .ToList();
-    }
 }