docs(get-started): add builders disclaimer

[bvsakhil]

What changed? Why?

• Added a third-party disclaimer at the bottom of the Builders page.
• Styled the disclaimer as normal body text to match the rest of the page.
• Renamed "Home Base" to "Homebase".
• Replaced the community region labels with short descriptions.
• Added Builder Circle as a third community with its Telegram link.
• Updated the Builder Stack Learn More button to point directly to /get-started/builder-stack.

Notes to reviewers

• The disclaimer clarifies that third-party services, communities, accelerators, and programs are listed for informational purposes only and do not imply endorsement, recommendation, or partnership by Base or Coinbase.
• The Builder Stack link now uses its current page URL instead of relying on the old redirect.

How has it been tested?

• npm test (85 tests passed)
• node scripts/lint-mdx.js --files-from=changed-docs.txt --check-nav (0 errors, 0 warnings)
• Verified locally with mintlify dev.

Screenshots

N/A — local preview verified; no screenshots captured.

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[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[bvsakhil]

@mindapivessa Could you please review this Builders page update? It adds the third-party disclaimer at the bottom, updates the community names and descriptions, adds Builder Circle, and points the Builder Stack button directly to its current page. Local tests and MDX checks pass.

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[mindapivessa]

Could the disclaimer text use a smaller font size?

[bvsakhil]

@mindapivessa Thanks for the feedback! I updated the disclaimer in commit 7ab116c. It now uses the same body text style as the rest of the page, so it stays readable and consistent with the page content. Could you please take another look?

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