Add AI tools paragraph to contribution guideline.

[Gerrit91]

Description

Add an AI chapter on how we want to proceed with AI generated contributions.

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[Gerrit91]

For now I lean towards a permissive policy regarding the contributions despite the unclear situation regarding copyright and licensing. Let me know your view about it.

[majst01]

My thought / possible additions:

• Add automatic PR size detection into t-shirt sizes, depending on LOC and complexity and tell the PR author that large PRs which are AI assisted can be closed because of too large
• Let the author acknowledge that there is no license violation of other parties in the contributed code
• We must clarify if it is now time to make a CLA bot mandatory

Maybe more from my side later.

[Gerrit91]

For the metal-robot the CLA bot functionality is probably too complex, this would require us to search an external tool that can do it. T-shirt sizing maybe works depending on how difficult we want to measure code complexity.

[majst01]

For the metal-robot the CLA bot functionality is probably too complex, this would require us to search an external tool that can do it. T-shirt sizing maybe works depending on how difficult we want to measure code complexity.

This should not be done by the metal-robot, there are plenty of cla bots out there:

https://github.com/marketplace/cla-bot-cla-automation
https://easycla.lfx.linuxfoundation.org/

and others, we should together decide which to use