Adds Variable Checks

[Cornelius2121]

Adds the following checks in the package:

• Checks that the text length is greater than 1000 characters.
• Checks that the web request has been successful, and if not, responds with a message.

[monk1337]

Hi, Thank you for contributing. Can you convert the log prob into % in the readme?

[Cornelius2121]

Hi Monk,
My understanding is that the probability shown in the readme is in %, as it is specifically the probability of being AI-Generated. I might not be understanding correctly however. Thanks very much.

[monk1337]

Okay, The result looks very different 3.45.. ?
{'Class': 'very unlikely', 'AI-Generated Probability': 3.4583769381404563}

Can you run the example again and check if the result is same?