feat: add full stack trace option for browser logs

[chenjiahan]

Summary

• Add browserLogs: stackTrace: 'full' option to display complete stack traces in browser logs
• Refactor stack trace formatting logic for better maintainability
• Add e2e tests

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[Copilot]

Pull Request Overview

This PR adds support for displaying complete stack traces in browser logs through a new browserLogs.stackTrace: 'full' configuration option. Previously, only 'summary' (first frame) or 'none' were available.

Key changes:

• Extended BrowserLogsStackTrace type to include 'full' option
• Refactored stack trace formatting logic into smaller, reusable functions
• Added formatFullStack function to process and format all frames in a stack trace

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

File	Description
packages/core/src/types/config.ts	Added 'full' option to BrowserLogsStackTrace type and updated documentation
packages/core/src/server/browserLogs.ts	Refactored stack trace formatting with new helper functions and implemented full stack trace display
e2e/cases/browser-logs/stack-trace-full/*	Added e2e test case for basic full stack trace functionality
e2e/cases/browser-logs/stack-trace-full-react-error/*	Added e2e test case for full stack trace with React errors

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