feat(auth): add webServer.env

[romradchenko]

Adds Playwright-style env overrides for the auth CLI webServer process.

• webServer.env typed + validated
• Spawn merges { ...process.env, ...webServer.env }
• Docs updated + unit test added

[Copilot]

Pull request overview

This PR adds support for environment variable overrides in the webServer configuration, following Playwright's design pattern. Users can now specify custom environment variables for their web server process through the webServer.env configuration option.

Key Changes:

• Added env?: Record<string, string> field to webServer configuration with validation
• Updated web server spawning logic to merge custom env with process.env
• Added comprehensive test coverage and documentation

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
packages/auth/src/config/types.ts	Added optional env field to AuthWebServerConfig interface with documentation
packages/auth/src/config/loadAuthConfig.ts	Added validation to ensure webServer.env values are strings
packages/auth/src/cli/webServer.ts	Updated spawn logic to merge webServer.env with process.env
packages/auth/src/cli/args.ts	Added env field to WebServerArgs interface for consistency
packages/auth/src/cli/main.ts	Refactored webServer resolution logic to properly pass through env from config
packages/auth/src/tests/configFindAndLoad.test.ts	Added test cases for valid env usage and rejection of non-string values
packages/auth/README.md	Added documentation example showing env usage
README.md	Added documentation example showing env usage

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.