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 26, 2026, 3:30 PM

[Copilot]

Pull request overview

Updates repository documentation to highlight community guidelines and acknowledge EU funding in the project’s README.

Changes:

• Adds a second “Code of Conduct” section/link at the end of the README.
• Adds an EU funding logo image to the README.

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[Copilot]

The PR description says it adds a Code of Conduct link, but the README already includes a Code of Conduct section/link earlier in the file. Please either update the description to reflect the actual change (e.g., repositioning/duplicating) or adjust the README change so it truly adds the missing content without duplication.

[Copilot]

README now contains two separate "## Code of Conduct" sections (one above "Licensing" and this newly added one). Please keep a single Code of Conduct section to avoid duplication and confusion.

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).

[Copilot]

There are two consecutive blank lines added before the new section, which introduces unnecessary whitespace in the README. Consider keeping a single blank line between sections for consistent formatting.

Suggested change

[Copilot]

The EU funding logo is loaded from an external domain (apeirora.eu), which can create availability/privacy issues if the host changes or goes down. Consider vendoring the image into the repo (or using a GitHub-hosted asset) and note that the alt text acronym "BMWE" doesn’t match the image filename "BMWK-EU.png"—please verify the correct naming.

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) – EU funding logo" src="./BMWK-EU.png" width="400"/></p>