Add old read me and updated new read me with note to new repo

[emilygamedeveloper]

• This repo is to be archived, so I have updated the read me to point to the newer repo where work should go.
• The old read me has retained the other information but has been renamed to OLD_README.md
• A link has been added to the new read me to the old read me
• Links have been checked and there are currently no 404s.
• NOTE: OLD_README link doesn't work until this PR is merged since the link to the file won't exist until this is merged