Made some improvements under the hood!

We removed the wildcard for letters that are "in the word, but in the wrong position" and we replaced it with toggle switches.

When the toggle is off, the filtered words list is unaffected.

However, when the toggle is on (for a specific letter), words that don't have this letter at any position, or words that do have this letter but in the position(s) we know is(are) incorrect, are removed from the list. This leaves the words that contain this letter, and it's in the remaining possible positions.

WordlHelper was updated to work with the new version of Wordle, hosted on the NYTimes website.

We made the following improvements:
- UI clean up
- filtered list is sorted by most frequent first

We changed the icon of WordlHelper, and fix a few bugs in the background.