feat: add web content filter policy API for adult/explicit website blocking

[thisislvca]

Summary

This PR adds first-class web content filtering to react-native-device-activity, focused on blocking adult/explicit websites with Apple’s built-in filtering policies.

Why

A common Screen Time use case is to allow normal app/category behavior while still blocking adult/explicit websites.
Before this change, the package supported shielding and app/category controls, but did not expose Apple’s web content filter policy as a dedicated API.

What’s included

• New public policy input type:
  • WebContentFilterPolicyInput with none, auto, specific, and all modes.
• New JS/native APIs:
  • setWebContentFilterPolicy(policy, triggeredBy?)
  • clearWebContentFilterPolicy(triggeredBy?)
  • isWebContentFilterPolicyActive()
• Action support for background/scheduled execution:
  • setWebContentFilterPolicy
  • clearWebContentFilterPolicy
• iOS native implementation for parsing, normalization, validation, and applying policy via ManagedSettings web content controls.
• Strict validation and limits (including Apple’s 50-domain limits per policy mode).
• README updates with usage examples and key Apple documentation links.
• Example app updates (AllTheThings) to manually test apply/clear/status for web filter policies.
• Test coverage additions for TypeScript wrappers and iOS policy parsing/action behavior.

Notes

• The web content policy is intentionally independent from existing shield/block-all behavior.
• This enables adult/explicit website filtering as a standalone policy or as part of schedule-driven actions.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/kingstinct/react-native-device-activity@86

commit: d0f0186

[thisislvca]

Side note, I'm actively using this in my app, would love to see it merged & released when possible