Add Hive Mind

[Montoya]

This closes #1414

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Note

Adds the npm:@hivemindhq/snap entry to src/registry.json.

• Registers Hive Mind Snap with full metadata (name, summary, description, category, support KB, source code, screenshots)
• Adds versions entry for 1.2.4 with checksum
• No other registry entries modified beyond insertion

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