feat: subscribeTo and subscribeFrom push notifications

[yamal-alm]

Implementation of #275

[yamal-alm]

CHANGELOG.md is autogenerated by a workflow and sometimes it doesn't comply with Prettier rules, in fact it is failing in master right now. I'm excluding it from Prettier execution but another solution would be to execute yarn --prettier -w CHANGELOG.md after updating it. WDYT?

[Marcosld]

Being autogenerated I think it's cool to ignore it

[Copilot]

Pull request overview

Adds a new WebView Bridge API surface for initiating push-notification subscription/unsubscription flows from web code, backing it with new bridge message types, documentation, and tests, as requested in issue #275.

Changes:

• Introduces subscribeToPushNotifications() / unsubscribeFromPushNotifications() web APIs that call the native bridge with SUBSCRIBE_TO_PUSH_NOTIFICATIONS / UNSUBSCRIBE_FROM_PUSH_NOTIFICATIONS.
• Extends ResponsesFromNativeApp typing to include the two new message types.
• Adds Jest tests and README docs for the new APIs; exports them from the package entrypoint.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/push-notifications.ts	Adds the new push subscription/unsubscription wrapper functions over postMessageToNativeApp.
src/post-message.ts	Adds response type entries for the two new bridge message types.
src/tests/push-notifications-test.ts	Adds tests for success and error scenarios for both methods.
README.md	Documents the two new APIs and their error cases.
index.ts	Exposes the new APIs from the package root.
.prettierignore	Normalizes /coverage entry and ignores CHANGELOG.md.

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[tuentisre]

🎉 This PR is included in version 5.4.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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