New Theme

[VihaanD1234]

What: This PR adds a new theme by making a new css file and inserting it into index.html.
Why: This matters because it adds more variety to the game.
Verified: I verified this by testing it in a browser. I expected a working game with different colors. I observed the same game with a different color scheme.
Status: This PR is ready for review. Next step is to implement it into the game.

[DylanLCrocker]

(1) One change you could make to your PR is to add 2 lines to the .gitignore file
(2) what this will do is stop you from trying to push 500,000 line changes
(3) To fix it we have to take back your 2 commits, add the 2 lines, and the commit the changes and force push it

1: reset the 2 commits you have made
run in terminal: git reset HEAD~2
2: add the 2 lines to the .gitignore

3: commit 1
commit the changes to the .gitignore
4:commit 2
Now you can now commit all of the other changes you had previously made
5: force push the new changes
run in terminal: git push -f origin
note: I would also change the names of your commits so they are more clear