Add Vestige MCP server listing

[samvallad33]

Vestige should fit the mcp-server category for opencode.cafe.

It is a local stdio MCP server that gives OpenCode agents persistent memory across sessions: project decisions, preferences, architecture context, and previous fixes stay searchable without a hosted service.

Ready-to-submit JSON:

{
  "productId": "vestige",
  "type": "mcp-server",
  "displayName": "Vestige",
  "description": "Local MCP memory server for OpenCode agents. Vestige stores memory locally and gives agents searchable recall for project decisions, preferences, architecture context, and previous fixes across sessions.",
  "repoUrl": "https://github.com/samvallad33/vestige",
  "homepageUrl": "https://github.com/samvallad33/vestige",
  "tags": ["mcp", "memory", "local-first", "opencode", "ai-agents"],
  "installation": "npm install -g vestige-mcp-server@latest\nnpx @vestige/init"
}

Verified with OpenCode 1.16.2 using the current mcp.vestige config shape and opencode mcp list.