Allow printing of any plaintext file

[evanugarte]

If we had a .txt file or .py file, we should be able to print these files since they are simple. Right now we only support .pdf files

game plan

• make sure you understand the basics of FastAPI
• follow this projects readme for running in development
• if it works locally, try passing a .txt file or .py file to the server, does the file get saved?

game plan 2 (clark)

• follow the Clark dessert problem, discuss with evan on this
• on clark, allow for any file to be uploaded in the frontend, assume if its not pdf to be a .txt file.
• ensure the file makes it all the way to quasar's directory after the user submits
• meet with evan in SCE to make sure the printer prints this plaintext file