[Demo] Supporting code to demo Zed integration

[rubiojr]

Companion PR for https://github.com/github/zed-context-server

Not to be merged.

Screencast.From.2025-03-14.11-44-01.mp4

[Copilot]

Pull Request Overview

This PR adds support for a new GitHub prompt integration to display the authenticated user’s identity for a Zed demo.

• Introduces a new prompt handler in pkg/github/prompts.go.
• Enables prompt and tool capabilities in the MCP server configuration in pkg/github/server.go.
• Registers the new GitHub prompt handler with the server.

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
pkg/github/prompts.go	New prompt handler returning the GitHub user identity.
pkg/github/server.go	Updated server configuration to include prompt and tool capabilities and registration.

Files not reviewed (1)

• go.mod: Language not supported

Comments suppressed due to low confidence (1)

pkg/github/prompts.go:25

• When the response status code is not 200, 'err' is nil. Update the error handling to capture and provide a meaningful error message or response body content.

return nil, fmt.Errorf("failed to read response body: %w", err) 

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[rubiojr]

Closing, this was for demo purposes only.