perf: use blazediff instead of pixelmatch for visual testing

[teimurjan]

Summary

This PR replaces pixelmatch with blazediff in the E2E testing infrastructure to improve image comparison performance.

Motivation

• BlazeDiff is a faster alternative to pixelmatch for pixel-by-pixel image comparison.
• Reduces test execution time by using a more performant diff algorithm

Implementation

• Updated e2e/helpers.ts to use BlazeDiff instead of pixelmatch in the compareImages function
• Replaced pixelmatch dependency with @blazediff/core. The API is compatible. Both libraries return the number of differing pixels.
• Updated reference images because both the latest pixelmatch (v7) and BlazeDiff do not blend transparent pixels with white. (It ensures consistency in the comparison for transparent background images)

Impact

• E2E testing infrastructure only
• No changes to library functionality or public API

Integration

BlazeDiff is already integrated in:

• ant-design/ant-design
• antvis/g
• vega/vega
• apexcharts/apexchartsjs

Test Plan

Run the E2E test suite to verify image comparison still works correctly. The steps I followed are described in the docs: https://github.com/software-mansion/react-native-svg?tab=contributing-ov-file#running-e2e-tests.

What's required for testing (prerequisites)?

What are the steps to reproduce (after prerequisites)?

yarn e2e

Verify that:

1. All E2E tests pass
2. Image comparison still correctly identifies visual differences
3. Diff images are generated properly when tests fail

Compatibility

OS	Implemented
iOS	✅
MacOS	✅
Android	✅
Web	✅

Checklist

• I have tested this on a device and a simulator
• I added documentation in README.md
• I updated the typed files (typescript)
• I added a test for the API in the __tests__ folder