#1 feat: timezone, geolocation, and locale spoofing patches

[PopcornDev1]

Summary

Updates the timezone and geolocation patches for per-context support, and improvements to the locale spoofing patch.

Changes

timezone-spoofing.patch (major update)

• Implements true per-context timezone isolation via per-realm DateTimeInfo in SpiderMonkey
• Restores Realm::getDateTimeInfo() that Playwright disabled, enabling each browser context to have its own timezone
• Adds window.setTimezone() WebIDL binding with TimezoneManager C++ class for per-context storage
• nsGlobalWindowInner::SetTimezone() calls both per-realm (JS::SetRealmTimeZoneOverride) and global (nsJSUtils::SetTimeZoneOverride) APIs
• Validates timezone strings before applying (throws TypeError for invalid)
• DateTimeInfo constructor uses delegation pattern (: DateTimeInfo()) for proper member initialization

geolocation-spoofing.patch (restored + fixed)

• Restores CAMOU_CONFIG backwards compatibility for global geolocation spoofing
• Geolocation.cpp: Auto-approves geolocation permission when lat/lon are configured in MaskConfig
• GeolocationPosition.cpp: Returns spoofed coordinates from geolocation:latitude / geolocation:longitude config
• NetworkGeolocationProvider.sys.mjs: Returns spoofed location at the network provider level
• Fixed moz.build hunk line numbers and trailing newline issues from earlier version

locale-spoofing.patch (minor fix)

• Adds LOCAL_INCLUDES += ["/camoucfg"] to dom/base/moz.build for MaskConfig.hpp access
• Required for other patches that need MaskConfig in the dom/base directory

anti-font-fingerprinting.patch (build dependency)

• Adds RoverfoxStorageManager.h to EXPORTS and RoverfoxStorageManager.cpp to UNIFIED_SOURCES in dom/base/moz.build
• Required because WebRTC patch (which previously exported RoverfoxStorageManager) is now disabled
• Other per-context managers (AudioFingerprintManager, ScreenDimensionManager) depend on RoverfoxStorageManager

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch timezone-geolocation-spoofing

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