feature: add dynamic messages support

[sumitanvekar]

Changes

Added a feature to support {author} place holder which can be used in messages. It's built in backward compatible way.

Context

Feature request #877

[sumitanvekar]

Created pr to get feedback. Based on that, I can update documentation.

[Relequestual]

Eyeballed and looks reasonable. Includes tests. Not expecting my review to count for much other than signalling I'd like to see this.

[Ayazcan3333]

sumitanvekar:add-dynamic-messages

[dsame]

this might be considered as a special case of the problem #877

[sumitanvekar]

haven't been able to give time tot this one to get it to mergeable state. I will try to spend sometime by next week.

[sumitanvekar]

@IvanZosimov could you approve the workflow runs, please?

[aattalla]

any updates here to be released soon? @Relequestual 🙏 We need to be able to tag the PR author in the messages.

[jfoliveira]

Hey maintainers (@HarithaVattikuti @aparnajyothi-y @chiranjib-swain @priyagupta108 @Relequestual ),

This PR was good effort from @sumitanvekar that even included automated tests to ensure high quality. ❤️
Could you update its branch and merge it or explain in the comments why it can't be merged?

This is a frequently requested feature, as can be seen in the issues below, so it would be great to have the ability to dynamically tag the PR @author in actions/stale messages.

Please give us an update! 🙏

Issues that mention this feature:

• Adding a possibility to tag/mention team members in the bot comment #558
• Feature Request - Tag the creator of the pull request #714
• Dynamic messages #877