docs: improve README with updated connectors, SaaS options, MCP integ…

[shrutisharma-sh]

Summary

This PR improves the README by addressing outdated and missing information to provide a clearer onboarding experience for users and contributors.

Changes

• Updated connector count from 84+ to 120+

• Expanded "Install and Run" section to include:

  • Self-host (Docker)
  • Live Sandbox
  • Free Managed Cloud (Collate)

• Added MCP (Model Context Protocol) integration under Key Features

• Introduced a Prerequisites section for contributors

Impact

These updates improve accuracy, reduce onboarding friction, and highlight newer features like MCP integration for the AI/LLM ecosystem.

References

• https://open-metadata.org/
• https://open-metadata.org/mcp

Closes #<27009>

[github-actions]

Hi there 👋 Thanks for your contribution!

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[gitar-bot]

Code Review ✅ Approved

Updated the README with expanded connector documentation, SaaS deployment options, and new MCP integration details. No issues found.

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[github-actions]

🟡 Playwright Results — all passed (25 flaky)

✅ 3631 passed · ❌ 0 failed · 🟡 25 flaky · ⏭️ 84 skipped

Shard	Passed	Failed	Flaky	Skipped
🟡 Shard 1	474	0	6	4
🟡 Shard 2	643	0	2	7
🟡 Shard 3	645	0	8	1
🟡 Shard 4	622	0	4	22
✅ Shard 5	612	0	0	42
🟡 Shard 6	635	0	5	8

🟡 25 flaky test(s) (passed on retry)

• Features/DataAssetRulesDisabled.spec.ts › Verify the Pipeline entity item action after rules disabled (shard 1, 2 retries)
• Features/DataAssetRulesDisabled.spec.ts › Verify the Database entity item action after rules disabled (shard 1, 1 retry)
• Features/DescriptionSuggestion.spec.ts › Reject All Suggestions (shard 1, 1 retry)
• Pages/AuditLogs.spec.ts › should apply both User and EntityType filters simultaneously (shard 1, 1 retry)
• Pages/Customproperties-part1.spec.ts › Timestamp (shard 1, 1 retry)
• Pages/UserCreationWithPersona.spec.ts › Create user with persona and verify on profile (shard 1, 1 retry)
• Features/BulkEditEntity.spec.ts › Glossary (shard 2, 1 retry)
• Features/ChangeSummaryBadge.spec.ts › AI badge should NOT appear for manually-edited descriptions (shard 2, 1 retry)
• Features/Permissions/GlossaryPermissions.spec.ts › Team-based permissions work correctly (shard 3, 1 retry)
• Features/RestoreEntityInheritedFields.spec.ts › Validate restore with Inherited domain and data products assigned (shard 3, 2 retries)
• Features/RestoreEntityInheritedFields.spec.ts › Validate restore with Inherited domain and data products assigned (shard 3, 1 retry)
• Features/RestoreEntityInheritedFields.spec.ts › Validate restore with Inherited domain and data products assigned (shard 3, 1 retry)
• Features/RTL.spec.ts › Verify Following widget functionality (shard 3, 1 retry)
• Flow/CustomizeWidgets.spec.ts › Activity Feed Widget (shard 3, 1 retry)
• Flow/NotificationAlerts.spec.ts › Alert operations for a user with and without permissions (shard 3, 1 retry)
• Flow/PersonaFlow.spec.ts › Set default persona for team should work properly (shard 3, 1 retry)
• Pages/Customproperties-part2.spec.ts › entityReferenceList shows item count, scrollable list, no expand toggle (shard 4, 1 retry)
• Pages/DataContractsSemanticRules.spec.ts › Validate Description Rule Is_Set (shard 4, 1 retry)
• Pages/DataContractsSemanticRules.spec.ts › Validate Description Rule Is_Not_Set (shard 4, 1 retry)
• Pages/Domains.spec.ts › Rename domain with tags and glossary terms preserves associations (shard 4, 1 retry)
• Pages/Lineage/LineageFilters.spec.ts › Verify lineage schema filter selection (shard 6, 1 retry)
• Pages/Lineage/LineageRightPanel.spec.ts › Verify custom properties tab IS visible for supported type: searchIndex (shard 6, 1 retry)
• Pages/Users.spec.ts › Permissions for table details page for Data Consumer (shard 6, 1 retry)
• Pages/Users.spec.ts › Check permissions for Data Steward (shard 6, 1 retry)
• VersionPages/EntityVersionPages.spec.ts › Directory (shard 6, 1 retry)

📦 Download artifacts

How to debug locally

# Download playwright-test-results-<shard> artifact and unzip
npx playwright show-trace path/to/trace.zip    # view trace