feat(load): add cosmiconfig typescript loader

[songhn233]

Description

Add ts format config support.

Reference to cosmiconfig loader document, add @endemolshinegroup/cosmiconfig-typescript-loader to load the ts config according to a higher priority than the js config.

Motivation and Context

#2652

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[songhn233]

@escapedcat request review

[escapedcat]

Thank you @songhn233 for this PR and @polkovnikov-ph for the review and nitpicking ;)
You think it would be good to add a test for a ts-config-file, like we do here?:
https://github.com/conventional-changelog/commitlint/blob/master/%40commitlint/load/src/load.test.ts#L36

Let's wait for the others to review.

[songhn233]

You think it would be good to add a test for a ts-config-file, like we do here?

The tests in load only include js-config-file, if ts-config-file tests are added then yaml and other format tests I think can be added as well.

[reverofevil]

@escapedcat I tried to follow Conventional Comments. Seems to be very applicable for PRs in this repo :)

(Of course I forgot to put a (non-blocking) decorator :/)

[AdeAttwood]

All looks good. I am with @escapedcat and can we get a test added for it.

Thanks for getting this one in 👍

[songhn233]

@escapedcat @AdeAttwood
I added test cases, but since the fixtures mechanism makes it impossible to import types from other modules, I creat a single type.ts.

To avoid complex definitions for some properties I defined directly as any.

[jcayzac]

The PR also fixes #2711

[AdeAttwood]

I think this is all good. TBH, I am not too worried about the types in this test. This test is fine to test that you can load a .ts file in the config. We can sort out other tests for the types.

[escapedcat]

Do we need to update the docs for this?
Just saw this: #83 (comment)

[escapedcat]

It's released, please have a look. Thanks

[escapedcat]

Hey people, please have a look at this update PR: #3253
Happy for any feedback!