feat: e2e snapshot tests (#2338)

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# Summary

This PR adds E2E tests based on view screenshots done via
`react-native-view-shot`. It only works with devices that have their
[pixel ratio](https://reactnative.dev/docs/pixelratio) equal `3`. If you
want to use device with different pixel ratio, you need to adjust it in
`e2e/generateReferences.ts` viewport and regenerate reference images
(see below).

Steps to run tests:
- Run Metro server for example app via `yarn start` in example app's
directory
- Run `example` app on platform of your choice (currently only Android &
iOS are supported) via `yarn android` or `yarn ios` in example app's
directory
- Run `yarn e2e` in project's root directory to start Jest server
- Select `E2E` tab in example app
- Wait for tests to finish
- You can see test results, as well as diffs (actual rendered svg vs
reference image) in `e2e/diffs` directory

Steps to add new test cases:
- Put SVG of your choice to `e2e/cases` directory
- Run `yarn generateE2eRefrences`, this will open headless chrome
browser via `puppeteer` and snapshot all rendered SVGs to .png files and
later use them as reference in tests
- You should see new .png files in `e2e/references`
- When you run E2E tests again, it will use new test case(s) you've
added

## Test Plan


https://github.com/software-mansion/react-native-svg/assets/41289688/24ee5447-ce9a-43b6-9dde-76229d25a30a


https://github.com/software-mansion/react-native-svg/assets/41289688/71d1873f-8155-4494-80bd-e4c1fa72a065


### What's required for testing (prerequisites)?
See Summary

### What are the steps to reproduce (after prerequisites)?
See Summary

## Compatibility

| OS      | Implemented |
| ------- | :---------: |
| iOS     |    	✅     |
| Android |    ✅     |
| Web | 		❌	 |
## Checklist



<!-- Check completed item, when applicable, via: [X] -->

- [X] I have tested this on a device and a simulator
- [x] I added documentation in `README.md`
- [X] I updated the typed files (typescript)
- [X] I added a test for the API in the `__tests__` folder

---------

Co-authored-by: bohdanprog <bohdan.artiukhov@swmansion.com>
Co-authored-by: Jakub Grzywacz <jakub.grzywacz@swmansion.com>

tests-example/ios/Podfile.lock

@@ -1058,7 +1058,7 @@ PODS:
     - RCT-Folly (= 2022.05.16.00)
     - React-Core
     - ReactCommon/turbomodule/core
-  - RNSVG (15.3.0):
+  - RNSVG (15.6.0):
     - React-Core
   - SocketRocket (0.6.1)
   - Yoga (1.14.0)
@@ -1278,10 +1278,10 @@ SPEC CHECKSUMS:
   React-utils: debda2c206770ee2785bdebb7f16d8db9f18838a
   ReactCommon: ddb128564dcbfa0287d3d1a2d10f8c7457c971f6
   RNReanimated: 2fb8bf314df48f4968d9080aec46c47eb44a446a
-  RNSVG: a48668fd382115bc89761ce291a81c4ca5f2fd2e
+  RNSVG: 5da7a24f31968ec74f0b091e3440080f347e279b
   SocketRocket: f32cd54efbe0f095c4d7594881e52619cfe80b17
   Yoga: 2b33a7ac96c58cdaa7b810948fc6a2a76ed2d108
 
-PODFILE CHECKSUM: 0ddaec8b74c24b39086422661a8aeb46f68d0382
+PODFILE CHECKSUM: 867081623c4821048817e3d8ade1e288af6d41a7
 
 COCOAPODS: 1.15.2