Add a new type of radio for single input. Closes #20

[y805939188]

What kind of change does this PR introduce?

• Bugfix
• New Feature
• Feature Improvement
• Refactoring
• Documentation
• Other, please describe:

Description:

In my scenario, users want to be able to select by the st.radio component when making a single selection. So I solved this problem by passing a "st_kwargs_ui_type" to Field.
Another way is to create a new type named "RadioContent" like "FileContent". If there are other better ways, please tell me.
Thank you very much.

Checklist:

• I have read the CONTRIBUTING document.
• My changes don't require a change to the documentation, or if they do, I've added all required information.

[HIL340]

I'm not the maintainer obviously but I like the idea of adding radio buttons as an option wherever a single selectbox is currently used.

Would it make more sense though to re-use the format attribute (instead of introducing st_kwargs_ui_type). It's already being used for very similar purposes for multi-line text and date/time/datetime.

[y805939188]

I'm not the maintainer obviously but I like the idea of adding radio buttons as an option wherever a single selectbox is currently used.

Would it make more sense though to re-use the format attribute (instead of introducing st_kwargs_ui_type). It's already being used for very similar purposes for multi-line text and date/time/datetime.

I think you are right, maybe it's better to use format, I will try to change to format later when I have time. thank you.