Remove Temporary Files if the program terminates abnormal

[Prince-Bhagat]

While sending text from one device to another, we create a temporary file in the app's root directory. But if the program gets terminated for some reason or the user terminates it intentionally, the temporary files are stored in the root folder forever.

Steps to reproduce the bug

1. croc send --text randomtext
2. ctrl + c (this is to terminate program abnormally)

check the temporary files in the directory
Solution

• Create a separate directory called temp for storing the temporay files.
• Implement the callback for program termination to clean up the temporary data.