Add new tools to the MCP server and langchain integrations

[gitbuda]

• extend MCP -> probably CI failing because of not releasing the memgraph-toolbox
• extend langchain

If you want the local changes to be visible to the MCP client, the following is the config (--project has to point to the mcp-memgraph folder):

{
  "mcpServers": {
    "mpc-memgraph": {
      "command": "/Users/buda/.local/bin/uv",
      "args": [
          "run",
          "--with",
          "mcp-memgraph",
          "--python",
          "3.13",
          "--project", "/Users/buda/Workspace/code/memgraph/ai-toolkit/integrations/mcp-memgraph/",
          "/Users/buda/Workspace/code/memgraph/ai-toolkit/integrations/mcp-memgraph/src/mcp_memgraph/main.py"
      ]
    }
  }
}

[antejavor]

This currently makes only langchain, which doesn't have these tools. Did you plan to add it to this PR, or will it be another PR? If it will be another PR, let's just open an issue so we don't forget.

Also, since you have bumped up the versions, are we going to release it? @gitbuda