feat: add Tombstone to interested parties

[sairam0424]

Tombstone is a self-hosted feature flag platform with an OpenFeature-compatible TypeScript provider.

The provider at packages/sdks/@flagmind/core/src/provider.ts implements:

• All 4 typed resolvers (Boolean, String, Number, Object)
• All 5 provider states (NOT_READY, READY, STALE, ERROR, FATAL)
• No-throw guarantee on all resolvers

GitHub: https://github.com/sairam0424/Tombstone

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: c25b7be9-8cc3-4532-a8aa-8f618bd3b6af

📥 Commits

Reviewing files that changed from the base of the PR and between d857bd7 and 4a239ad.

📒 Files selected for processing (1)

• interested-parties.md

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📝 Walkthrough

Walkthrough

A new row for the Tombstone organization is added to the "Interested organizations" table in interested-parties.md, including its GitHub link and contact email support at tombstone.dev.

Interested Parties Update

Layer / File(s)	Summary
Add Tombstone organization entry interested-parties.md	Adds a single table row for Tombstone with its GitHub URL and support contact email.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~1 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly states the main change: adding Tombstone to the interested parties list.
Description check	✅ Passed	The description is related to Tombstone, which matches the added interested party entry.
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.

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Warning

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