Add Env Setup to Copilot Instructions

[JennyPng]

Azure/azure-sdk-tools#12592

• Adding instructions on using new Verify Setup MCP tool, which checks that requirements are installed in the environment
• We want this check to be proactive and happen without explicit invokation. However, currently, Copilot would only remember if the tool is run in the current session, not in newer sessions, so the user would likely run verify setup in each new session due to a lack of a caching. This will be accepted for Scenario 1 and improved in future iterations

Example of implicitly running this tool before running a different requested tool

[Copilot]

Pull Request Overview

This PR adds documentation to instruct GitHub Copilot to proactively verify the user's development environment setup before running SDK MCP tools.

• Adds a new prerequisite bullet point instructing Copilot to always run the azsdk_verify_setup tool before proceeding with other SDK MCP tool operations
• Ensures environment validation happens early in the workflow to prevent tool execution failures due to missing dependencies

[samvaity]

Are we missing the verify-setup.instructions.md file ?

[JennyPng]

@samvaity no it was synced https://github.com/Azure/azure-sdk-for-java/blob/main/eng/common/instructions/azsdk-tools/verify-setup.instructions.md , this branch might just be behind main

[JennyPng]

/check-enforcer override