[ADD] .github: add action to tag and close stale issues and PRs T#61194

[luisg123v]

A new GitHub action is added to tag old issues and PRs as stale and, if no furter activity occurs on them, close them automatically

Stale parameters are as follows:

• Mark PR as stale if no activity occurred in last 120 days
• Close PR if it has been stale for 30 days
• Mark issue as stale if no activity occurred in last 180 days
• Close issue if it has been stale for 30 days

This is based on OCA's stale actions [1].

[1] https://github.com/OCA/oca-addons-repo-template/blob/master/src/.github/workflows/%7B%25%20if%20ci%20%3D%3D%20'GitHub'%20%25%7Dtest.yml%7B%25%20endif%20%25%7D.jinja

[luisg123v]

Hi @moylop260,

Could you review, please?

[moylop260]

:+1: