Enable a Tester automation that will try out UI changes in PRs and upload a vide

[TylerLeonhardt]

The idea is to light up a workflow like so:

• You get a PR that doesn't have any screenshots/video attached to it, so you don't know what the end result looks like
• You add ~copilot-video-please, which triggers automation

That automation:

• Builds Code OSS off that branch
• Uses Copilot CLI to be the agent and ask it to "try out the feature being touched"
  • This uses the vscode-playwright-mcp server we have in the test/mcp folder which supports video recording
  • It also supports tool calls for controlling an instance of Code OSS
• A video gets uploaded to the PR so that we can see what the change actually does

Constraints

• Let's start with these videos only being viewable by folks on the team
• Focus on PRs, but issues could be supported later for bug verification & "what's available" feature exploration

[TylerLeonhardt]

This is now available

[TylerLeonhardt]

Linking the followups:

• [copilot-video-please] Move ~copilot-video-please Copilot CLI runner into open source #274458
• [copilot-video-please] Don't start vscode-playwright-mcp immediately while learning about the PR #274461
• Make it easier for Playwright to write to a Monaco editor #275727

[johngrant]

Link to a PR that contains this automation please?