Update "def text_length"

[BBC-Esq]

This change enhances the text_length function to support a wider range of input types, particularly adding support for strings and lists of strings. Specifically...

Initially Supported:

1. List of integers (List[int])
2. List of lists of integers (List[List[int]])
3. Dictionary (dict) - handled as a special case

Now Supports:

1. String (str)
2. List of strings (List[str])
3. List of integers (List[int])
4. List of lists of integers (List[List[int]])
5. Dictionary (dict) - handled as before

The impetus for this pull was the fact that some programs provide a different format in order to work properly...And under the current implementation, it was breaking the program. I tried multiple times to fix this but was unsuccessful and this was the only solution that worked.

Please note, the commented out portions represent the deleted text so it's a little redundant with how Github does the comparison. Apologies for that; that's just want way it was modified in my script and the comments can obviously be deleted.