Add Snapchat profile deep link handler

[ultronop592]

Summary

Adds support for opening Snapchat profile URLs directly in the Snapchat app using native deep links.

Changes

• Introduced a new Snapchat platform handler in the core library
• Supports URLs of the form https://www.snapchat.com/add/{username}
• Generates platform-specific deep links:
  • iOS: snapchat://add/{username}
  • Android: intent-based deep link with browser fallback
• Registered the handler in the central handler registry

Testing

• Tested locally using the demo application
• Verified deep link generation by pasting Snapchat profile URLs
• Confirmed correct behavior on desktop and mobile environments

[coderabbitai]

Important

Review skipped

Review was skipped as selected files did not have any reviewable changes.

💤 Files selected but had no reviewable changes (1)

• packages/core/src/platforms/snapchat.ts

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}