feat(jmanus): add ppt generation tool and fiexd the problem about tool prompt

[SapientialM]

Describe what this PR does / why we need it

1. Added a PPT generation tool and its corresponding Agent, currently only supporting the generation of PPTs with text and titles without applying templates.
2. Fixed the issue of incorrect TOOL_TOOL definition in the tool prompt.

Does this pull request fix one issue?

#1472

Describe how you did it

1. added a tool named ppt_generator_tool, integrating Apache POI operations
2. along with the corresponding ppt_generator_agent to support PPT generation with text and titles
3. fixed the issue where the FILE_MERGE_TOOL prompt could not be found due to the incorrect naming of TOOL_TOOL.

Describe how to verify it

The PPT generation tool is located in the extensions folder.

{
  "planType": "simple",
  "title": "生成阿里云公司介绍PPT的计划",
  "directResponse": false,
  "steps": [
    {
      "stepRequirement": "[DEFAULT_AGENT] 收集阿里云的基本信息，包括公司简介、主要产品和服务、应用场景等",
      "terminateColumns": "step,status"
    },
    {
      "stepRequirement": "[TEXT_FILE_AGENT] 将收集到的信息整理成文本格式，并保存为一个文本文件",
      "terminateColumns": "step,status"
    },
    {
      "stepRequirement": "[PPT_GENERATOR_AGENT] 使用文本文件中的信息创建一个介绍阿里云公司的PPT文档，返回给用户PPT路径",
      "terminateColumns": "step,status"
    }
  ],
  "planId": "planTemplate-1754127984630"
}

Special notes for reviews

Pending Tasks:

• Image embedding in PPTs – Implementation incomplete
• Template support – Ability to apply existing slide templates not yet added
• Frontend PPT preview – Preview feature pending development