Allowing MCP server to discover and call available Angular schematics

### Command

mcp

### Description

Today, when I'm using LLM with the Angular MCP server, code is generated directly by the LLM but for some cases it would provide better result if it is using the available schematic (Angular ones or external libraries ones).

### Describe the solution you'd like

When using the Angular MCP server, I would expect LMM to be aware of which Angular schematics are available in the project (the ones from Angular + the ones from external libraries).
I would love that the Angular MCP server is able to read the schematic description and input, to know if it should use it or not and how to call it.

### Describe alternatives you've considered

_No response_

從 Angular CLI 的 `mcp` 命令開始，追蹤 MCP 伺服器如何公開工具。檢視 Angular schematics 和外部 schematics 如何被描述和呼叫；完成條件是伺服器能夠探索可用的專案 schematics、公開其輸入，並呼叫選取的 schematic。

由索引模型根據 Issue 內容生成。