Improve the behavior of "towncrier create"

[scoopex]

Description

Fixes #724

Checklist

• Make sure changes are covered by existing or new tests.
• For at least one Python version, make sure test pass on your local environment.
• Create a file in src/towncrier/newsfragments/. Briefly describe your
  changes, with information useful to end users. Your change will be included in the public release notes.
• Make sure all GitHub Actions checks are green (they are automatically checking all of the above).
• Ensure docs/tutorial.rst is still up-to-date.
• If you add new CLI arguments (or change the meaning of existing ones), make sure docs/cli.rst reflects those changes.
• If you add new configuration options (or change the meaning of existing ones), make sure docs/configuration.rst reflects those changes.

[adiroiban]

Thanks for the PR.
Is this ready for review and merge?

I see the WIP in the title... if the PR is not ready for review, you can mark it as "Draft"

---

To have the PR merged it will need updated tests and documentation.

Also, it needs a newsfragment for the future release notes.
We are dogfooding here... towncrier uses towncrier :)

Let me know if you need help with the docs and tests.

Thanks gain for your contribution.

[scoopex]

Sorry, i was aware of that option but had not found that option yesterday :-)

[adiroiban]

No problem.
When creating a new PR, the option is in the "Create PR" button