Add Buy Me a Coffee badge to READMEs

[coderabbitai]

Add Buy Me a Coffee support badge to both READMEs

Background

Discussion started in #598. A Buy Me a Coffee page has been created at https://www.buymeacoffee.com/couimet.

A companion issue for the personal website has been opened at couimet/couimet.github.io#87.

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Files to update

• README.md (repository root)
• packages/rangelink-vscode-extension/README.md

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Changes — same pattern for both files

Top badge row

Add after the last existing badge line a shields.io-style badge (matches height of other badges):

[![Buy Me A Coffee](https://img.shields.io/badge/Buy%20Me%20A%20Coffee-☕-yellow?logo=buy-me-a-coffee)](https://www.buymeacoffee.com/couimet)

Bottom of file

Add a Support section before the last line (Made with ❤️ ...):

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## Support

If you find RangeLink useful, you can support its development:

[![Buy Me A Coffee](https://www.buymeacoffee.com/assets/img/custom_images/orange_img.png)](https://www.buymeacoffee.com/couimet)

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Related

• Discussion: What's needed for extensions to get a "Verified" stamp on marketplaces ? #598
• Personal website issue: Add Buy Me a Coffee badge to RangeLink project page couimet.github.io#87