Provide the full binary path in the command, with \ to escape correctly C:\\Program Files\\nodejs\\npx.cmd. Or the answer by @romanown will also work, but you need to add npx in the PATH environment variable.

Here is the correct json configuration for your case.

{
  "mcpServers": {
    "DaisyUI Docs": {
      "command": "C:\\Program Files\\nodejs\\npx.cmd",
      "args": [
        "mcp-remote",
        "https://gitmcp.io/saadeghi/daisyui"
      ]
    }
  }
}