Refine coder prompt

[JonasHelming]

fixed #14886

What it does

Refines the coder prompt, see #14886

How to test

Some test prompts:

@Coder Add o13 and o14-mini to the default list of open ai models in the preferences of the openai package

@Coder Move the readme file to a sub direcotry called /readme

@Coder Implement the interface MCPServerManager in the same file (packages/ai-mcp/src/common/mcp-server-manager.ts). Don't ask me anything, jut do it.

@Coder Remove the prefix "MCP" from all user message in packages/ai-mcp/src/browser/mcp-command-contribution.ts

@Coder Do not display a message to the user anymore about the tools in packages/ai-mcp/src/browser/mcp-command-contribution.ts

@Coder Allow the user to start already started MCP servers again in packages/ai-mcp/src/browser/mcp-command-contribution.ts

Follow-ups

Breaking changes

• This PR introduces breaking changes and requires careful review. If yes, the breaking changes section in the changelog has been updated.

Attribution

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[sdirix]

Testing with the new prompt by pasting all the examples of the OP post in the same thread. As usual it deteriorates the longer the thread becomes.

Sadly the "one" function call was not strictly followed. These are the ones which misbehaved: