Randolf J.

This PR separates navigation handling and lifecycle handling in Puppeteer: - The new `NavigationWatcher` strictly handles navigation events and has been simplified drastically to only watch for the navigation response...

This PR consists of several changes including: - renaming `main.js` to `index.js`, - allowing custom `LineWriter`s during stringifying, - renaming `LineWriterImpl` to `InMemoryLineWriter`, - stricter type settings, - adding two...

[Bug]: `Frame.waitForSelector` is flaky for cross-process navigation

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1) waittask specs 1246 Frame.waitForSelector 1247 should survive cross-process navigation: 1248 done() called multiple times in test of file /home/runner/work/puppeteer/puppeteer/test/build/waittask.spec.js; in addition, done() received error: Error: NS_BINDING_ABORTED at http://127.0.0.1:44173/grid.html 1249...

This PR attempts to migrate IsolatedWorlds and ExecutionContexts away for entities such as Frames and WebWorkers.

chore: implement P queries

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This PR implements P queries. See internal doc.