we (web engine): Experimental web browser project to understand the limits of Claude

Advance bing.com hydration replay master

Seed first-level Bing JS bundles and add JS runtime/compiler shims needed to execute them further: parenthesized in expressions, matchMedia, performance, _w aliasing, and top-level var/capture handling. Issue 280 remains xfailed because Chromium parity still fails; filed isu issue 290 for the remaining hydration blockers. Refs isu issue 280 Refs isu issue 290