docs: Add Code of Conduct link and EU funding logo to README

[isanmaz]

This PR adds a link to the Code of Conduct and the EU funding logo to the README.

[coderabbitai]

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[github-actions]

The latest Buf updates on your PR. Results from workflow Buf CI / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	Mar 27, 2026, 10:34 AM

[Copilot]

Pull request overview

This PR updates the repository README to add a Code of Conduct link and display an EU funding logo.

Changes:

• Adds a new “Code of Conduct” section with a link to the org-wide Code of Conduct.
• Adds an EU funding logo image to the README.

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[Copilot]

README already contains a "## Code of Conduct" section earlier in the file (lines 23–25 in the current README). This change adds a second, duplicate Code of Conduct section; please consolidate into a single section (e.g., keep the existing one and add the logo under a more appropriate heading like Funding/Acknowledgements, or extend the existing CoC section without duplicating the header).

Suggested change

	## Code of Conduct
	To facilitate a nice environment for all, check out our [Code of Conduct](https://github.com/openkcm/.github/blob/main/CODE_OF_CONDUCT.md).
	## Funding and Acknowledgements

[Copilot]

The image alt text refers to "BMWE" while the image filename in the URL is "BMWK-EU.png". Please make the alt text consistent with the actual logo/organization name to avoid confusing readers and screen readers.

Suggested change

	<p align="center"><img alt="Bundesministerium für Wirtschaft und Energie (BMWE)-EU funding logo" src="https://apeirora.eu/assets/img/BMWK-EU.png" width="400"/></p>
	<p align="center"><img alt="Bundesministerium für Wirtschaft und Klimaschutz (BMWK) and European Union funding logo" src="https://apeirora.eu/assets/img/BMWK-EU.png" width="400"/></p>

[Copilot]

There are two consecutive blank lines before the new section header. Consider reducing to a single blank line to keep formatting consistent with the rest of the README.

Suggested change