Ignore types on check

[bentheiii]

Description

closes #617
Adds a new optional key to newsfragment categories called check (boolean, defaults to true). If set to false, towncrier check will not consider newsfragments of this category as enough to pass

Checklist

• Make sure changes are covered by existing or new tests.
• For at least one Python version, make sure local test run is green.
• Create a file in src/towncrier/newsfragments/. Describe your
  change and include important information. 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]

Many thanks for the PR.

It looks good.

I left a few minor comments

Major comments:

• The only_check_categories is confusing... especially without any extra documentation... but I hope we can have it removed.
• The tests needs a docstring/description

Thanks again

[adiroiban]

Looks good. Thanks.

Only minor comments.

I will let this PR unmerged for a few days to see if @SmileyChris has any extra feedback about this PR.

No news is good news, is we can check on Monday and see if this can be merged.

Thanks again

[adiroiban]

Sorry for not raising this in the first place. My bad.

Should this be more explicit / specific ?

Mabye in the future we would want to add some other things related to check behaviour. ... I am not sure what we might add... so this is just a minor comment.

Suggested change

	``check``
	``ignore_check``

[bentheiii]

I think that if this were ever needed, it would be easier to make the check a dict|bool rather than a separete knob from the ignore_check

[[tool.towncrier.type]]
...
check=false
[[tool.towncrier.type]]
...
check=true
[[tool.towncrier.type]]
...
check={"some_new_flag": "some_value"}

[adiroiban]

check={"some_new_flag": "some_value"}

this looks bad to me... if we use this, why bother with .INI or .TOML and not just go with JSON ?

If you dislike ignore_check then we can keep the current option.

[adiroiban]

This is not very clear... but I don't know how to better explain ths... writing good documentation is hard :)

Maybe

Suggested change

	A boolean value indicating whether the fragment should be considered by the ``towncrier check`` command.
	A boolean value indicating whether the fragment should be considered by the ``towncrier check`` command.
	When set to `false`, ``towncrier check`` will fail, unless the branch contains other newsfragment types.

[bentheiii]

Hi @adiroiban, can we merge this?