Link to marketplace from modes and MCP tab

[mrubens]

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Important

Add "Marketplace" button to MCP and modes tabs with translation updates for multiple locales.

• UI Changes:
  • Add "Marketplace" button in McpView.tsx with StandardTooltip and Button components, posting message with marketplaceTab: "mcp".
  • Add "Marketplace" button in ModesView.tsx with StandardTooltip and Button components, posting message with marketplaceTab: "mode".
• Translations:
  • Add "marketplace" key to mcp.json in multiple locales including en, de, es, fr, hi, id, it, ja, ko, nl, pl, pt-BR, ru, tr, vi, zh-CN, zh-TW.

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[delve-auditor]

✅ No security or compliance issues detected. Reviewed everything up to c272e74.

Security Overview

• 🔎 Scanned files: 20 changed file(s)

Detected Code Changes

Change Type	Relevant files
Enhancement	► ModesView.tsx     Add marketplace button in modes view ► McpView.tsx     Add marketplace button in MCP view ► mcp.json (multiple language files)     Add marketplace translation strings
Refactor	► embeddings.json (multiple language files)     Remove unused error message strings

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