feat: add taskmaster to docker mcp catalog

[bertlebee]

"Direct quote or clear summary of user request or need or user story."

Motivation

Using lots of different AI tools has meant setting up the same MCP tools repetitively. Using the docker MCP Toolkit means just adding a single mcp server, and has some security benefits.

more info here https://docs.docker.com/ai/mcp-catalog-and-toolkit/toolkit/

Proposed Solution

https://github.com/docker/mcp-registry/blob/main/CONTRIBUTING.md