docs: make the donation ask findable

[abdulsaheel]

Sibling of OpenStrap/edge#155, which has the reasoning in full.

The support section here pointed at edge's DONATE.md without ever showing an address — so supporting the project meant following a link to another repo to find out how. The addresses now appear inline, with a donate badge and a stars badge in the header row.

Docs only.

Summary by CodeRabbit

• Documentation
  • Added GitHub stars and donation badges to the protocol header.
  • Expanded the support section with Bitcoin and EVM donation details.
  • Added information about how donations are used and clarified that no subscriptions or paywalls are required.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: dfefd7c8-7ad5-4bd8-97af-77bb1d96caf7

📥 Commits

Reviewing files that changed from the base of the PR and between 488ec8e and f098389.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

The README adds GitHub stars and donation badges, and expands the “Support the work” section with cryptocurrency addresses, donation-purpose information, and statements about the absence of subscription or paywall gating.

Changes

README updates

Layer / File(s)	Summary
Badge and support messaging README.md	Adds GitHub stars and donation badges, and restructures donation guidance with BTC and EVM addresses, funding information, and no-paywall or subscription statements.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects the README documentation update that makes the donation information easier to find.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/donate-visibility

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