[Feature] Fallback to to_df() method when results are a string

[hjoaquim]

1. Why? (1-3 sentences or a bullet point list):

   • So that the to_df() method doesn't break if the results are a string.

2. What? (1-3 sentences or a bullet point list):

   • Wraps the string in a list so that it's data framable.

3. Impact (1-2 sentences or a bullet point list):

   • Minor UX improvement.

4. Testing Done:

   • res = obb.equity.price.historical(...)
   • res.results = "Hello!"
   • res.to_df()

[deeleeramone]

If the results are a simple string, let's just print it directly to the screen.

Converting to a DataFrame in this instance doesn't really provide any benefit or utility.

[hjoaquim]

If the results are a simple string, let's just print it directly to the screen.

Converting to a DataFrame in this instance doesn't really provide any benefit or utility.

Not related with the CLI, but this is actually a nice fallback to have, since it makes the to_df() method a bit more robust imo:

Before:

After: