[kf5textwidgets] new port

[wrobelda]

Describe the pull request

• What does your PR fix?

  Adds new kf5textwidgets port.
  Depends on:

  • [kf5configwidgets] new port #16562. Was merged to this PR for testing purposes, but please review separately. I will rebase once it gets merged upstream.
  • [kf5i18n] static builds fixes #20016. Was merged to this PR for testing purposes, but please review separately. I will rebase once it gets merged upstream.

• Which triplets are supported/not supported? Have you updated the CI baseline?

  All official.

• Does your PR follow the maintainer guide?

  Yes.

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

  Yes.

[wrobelda]

@JonLiu1993 this is now ready for a review, but please notice the dependency I mentioned in my first comment.

[wrobelda]

@wrobelda ,This pr also depends on #20090 ?

@JonLiu1993 not really, the #20016 provided all the fixes for kf5i18n. Once #20090 gets merged, I'll update kf5i18n and remove its patch.

#20016 was merged to master already, so I rebased this PR and it's good to go.

[BillyONeal]

Thanks again!