feat: add Memory MCP server definition (#54)

* Add Memory MCP server definition

Reference Memory MCP server from modelcontextprotocol/servers. Persistent
knowledge graph for storing entities, relations, and observations across sessions.

https://claude.ai/code/session_013AxurW8hPAfnUNvik354Xx

* fix: rename server files with transport suffix

- community.memory.json -> community.memory-npx.json (id: community.memory-npx)

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

---------

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

Author: its-mash

servers/community.memory-npx.json

@@ -0,0 +1,53 @@
+{
+  "$schema": "../schemas/server-definition.schema.json",
+  "id": "community.memory-npx",
+  "name": "Memory (npx)",
+  "alias": "memory",
+  "description": "Persistent memory using a local knowledge graph. Store entities, relations, and observations that persist across conversations.",
+  "icon": "https://avatars.githubusercontent.com/u/182288589?v=4",
+  "schema_version": "2.1",
+  "categories": [
+    "ai-ml"
+  ],
+  "tags": [
+    "memory",
+    "knowledge-graph",
+    "entities",
+    "persistence",
+    "context"
+  ],
+  "transport": {
+    "type": "stdio",
+    "command": "npx",
+    "args": [
+      "-y",
+      "@modelcontextprotocol/server-memory"
+    ],
+    "metadata": {
+      "inputs": []
+    }
+  },
+  "auth": {
+    "type": "none",
+    "instructions": "No authentication required. Memory is stored locally in a JSON file."
+  },
+  "contributor": {
+    "name": "Model Context Protocol",
+    "github": "modelcontextprotocol",
+    "url": "https://modelcontextprotocol.io"
+  },
+  "links": {
+    "repository": "https://github.com/modelcontextprotocol/servers",
+    "homepage": "https://modelcontextprotocol.io",
+    "documentation": "https://github.com/modelcontextprotocol/servers/tree/main/src/memory#readme"
+  },
+  "platforms": [
+    "all"
+  ],
+  "capabilities": {
+    "tools": true,
+    "resources": false,
+    "prompts": false,
+    "read_only_mode": false
+  }
+}