fix: Update README.md [skip-release]

[RambokDev]

Summary by CodeRabbit

• Documentation
  • Added sponsorship options for Platinum, Gold, Silver, and Community tiers.
  • Removed the Buy Me a Coffee support link.

[coderabbitai]

Navigate logical layers of code changes, visualize relationships, and explore their blast radius.

Note

Currently processing new changes in this PR. This may take a few minutes, please wait...

⚙️ Run configuration

Configuration used: Repository: Portabase/agent/.coderabbit.yaml

Review profile: CHILL

Plan: Advanced

Run ID: 67c7dc97-6a6d-4edc-b9de-3ab40f925223

📥 Commits

Reviewing files that changed from the base of the PR and between 496614b and b30f596.

📒 Files selected for processing (1)

• README.md

 _____________________________________________________
< Merge conflicts fear my conflict-resolution skills. >
 -----------------------------------------------------
  \
   \   (\__/)
       (•ㅅ•)
       / 　 づ

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!