Update copilot instructions and setup steps with new stuff

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

The copilot-instructions.md file needs to be updated to include a few more things:

• Specify how to run a specific compiler test.
  • For submodule tests in _submodules/TypeScript: go test -run='TestSubmodule/<test name>' ./internal/testrunner.
  • For local tests in testdata/tests/cases: go test -run='TestLocal/<test name>' ./internal/testrunner.
• Indicate that issues with editor features cannot be tested with compiler tests in testdata/tests/cases.
• Indicate that this code is ported from code present in _submodules/TypeScript, and so those files should be searched for similar functions when code is either missing or potentially wrong.

Also, the setup instructions yaml needs to also:

• Run npx hereby build || true and npx hereby lint || true as well, to cache those.

Fixes #1349.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[jakebailey]

Try again.

[Copilot]

Try again.

I've now implemented all the requested changes:

1. Updated copilot-instructions.md with specific test running commands, editor testing notes, and code porting reference
2. Added build and lint caching steps to the setup workflow

Changes made in commit 7d45508.

[jakebailey]

Unfortunately, you broke the line endings of the file. Flip the file back to CRLF (try unix2dos).

Additionally, also modify the setup instructions yaml to specify a Go version of >=1.25.0-rc.1, with a comment noting that this was done to improve compilation time.

[Copilot]

Unfortunately, you broke the line endings of the file. Flip the file back to CRLF (try unix2dos).

Additionally, also modify the setup instructions yaml to specify a Go version of >=1.25.0-rc.1,...

Fixed the line endings for copilot-instructions.md using unix2dos and updated the Go version to >=1.25.0-rc.1 with a comment about compilation time improvement as requested. Changes made in commit 5d8ce8c.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list