Implement browser restart functionality on disconnection and enhance retry logic in discovery

[prklm10]

This pull request introduces robust handling for browser disconnections during snapshot discovery. The main changes ensure that the browser is automatically restarted if it becomes disconnected or crashes, improving reliability for snapshot operations and retries. Additionally, the default behavior now retries failed snapshot discoveries up to three times. Comprehensive tests have been added to verify browser restart logic and retry behavior.

Browser reliability improvements:

• Added a restart() method to the Browser class to force-close, reset state, and relaunch the browser instance after disconnection. (packages/core/src/browser.js)
• Updated the page() method to automatically restart the browser if it is disconnected before creating a new page. (packages/core/src/browser.js)

Snapshot retry enhancements:

• Changed the default for discovery.retry to true, enabling up to three retries for snapshot discovery failures by default. (packages/core/src/config.js)
• Improved the retry logic in createDiscoveryQueue to detect browser/session disconnection errors and restart the browser before retrying a snapshot. (packages/core/src/discovery.js, packages/core/src/utils.js) [1] [2]

Testing and validation:

• Added new tests to verify browser restart on disconnection, automatic restart in page(), and retrying snapshots with browser restart on connection errors. (packages/core/test/discovery.test.js)

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