Don't allow merging pull requests without linked issue

[kappsegla]

When merging and closing pull request a linked issue will automatically be closed. Can be done either by linking branches and pull request from the web page under Development in the Sidebar UI -->
Or by using a text like closes #issuenumber
If we miss doing this an issue will not be automatically closed.

Describe the solution you'd like
I would to see if this action could work for automatic checking that a PR is linked to an issue.
There seems to be some limitations that the linking between PR and issue only can be done manually in the PR description? So no Sidebar UI?

There are alternatives to the action linked above. Probably they have the same limitation, demanding a link to the issue in the PR body?
https://github.com/tkt-actions/add-issue-links
https://github.com/hattan/verify-linked-issue-action

[TrungMa1]

Automating the closure of linked issues upon PR merge improves workflow efficiency

[kappsegla]

Automating the closure of linked issues upon PR merge improves workflow efficiency

Something you would like to implement @TrungMa1 ?
The first link seems to be updated resently while the other one hasn't change in a long time.

[TrungMa1]

Nothing particularly, it was just a statement.