Add workflow for stale issues

[merydian]

Issues with the label feedback will, after 30 days of inactivity, automatically be commented on with:

The Openrouteservice project highly values your report and would love to see it addressed.However, this issue has been left in feedback mode for the last 30 days and isbeing automatically marked as "stale".If you would like to continue with this issue, please provide any missing informationor answer any open questions. If you could resolve the issue yourself meanwhile,please leave a note for future readers with the same problem and close the issue.In case you should have any uncertainty, please leave a comment and we will behappy to help you proceed with this issue.If there is no further activity on this issue, it will be closed in two weeks.

Then with no further activity for a total of 45 days the Issue will be closed and commented on with:

While we hate to see this happen, this issue has been automatically closed because it has not had any activity in the last 45 days despite being marked as feedback. If this issue should be reconsidered, please reopen this it. Or, if you have any further questions, there are also further support channels that can help you.

[TheGreatRefrigerator]

some suggestions and questions

[TheGreatRefrigerator]

just to understand, this will only touch issues that manually got a feedback label?

[merydian]

Yes, that's how its done in QGIS. See qgis/QGIS#58465

[TheGreatRefrigerator]

Suggested change

	The Openrouteservice project highly values your report and would love to see it addressed.
	We highly value your report and would love to see it addressed.

[merydian]

I feel like this makes it a bit more personal but less professional.