Implement @mediabunny/prores extension, add onError callbacks to custom coders, fix visibleRect bug in VideoSample

docs/guide/extensions/prores.md

@@ -0,0 +1,36 @@
+---
+description: The @mediabunny/prores extension provides an extremely fast Apple ProRes decoder for the browser.
+---
+
+# @mediabunny/prores
+
+Browsers have no support for Apple ProRes in their WebCodecs implementations. This extension package provides a decoder for use with Mediabunny, allowing you to decode ProRes directly in the browser at unprecedented speed. It is implemented using Mediabunny's [custom coder API](https://mediabunny.dev/guide/supported-formats-and-codecs#custom-coders) and uses [TurboRes](https://github.com/Vanilagy/turbores), an extremely fast WASM-based ProRes decoder, under the hood.
+
+<a class="!no-underline inline-flex items-center gap-1.5" :no-icon="true" href="https://github.com/Vanilagy/mediabunny/blob/main/packages/prores/README.md">
+	GitHub page
+	<span class="vpi-arrow-right" />
+</a>
+
+## Installation
+
+This library peer-depends on Mediabunny. Install both using npm:
+```bash
+npm install mediabunny @mediabunny/prores
+```
+
+Alternatively, directly include them using a script tag:
+```html
+<script src="mediabunny.js"></script>
+<script src="mediabunny-prores.js"></script>
+```
+
+This will expose the global objects `Mediabunny` and `MediabunnyProres`. Use `mediabunny-prores.d.ts` to provide types for these globals. You can download the built distribution files from the [releases page](https://github.com/Vanilagy/mediabunny/releases).
+
+## Usage
+
+```ts
+import { registerProresDecoder } from '@mediabunny/prores';
+
+registerProresDecoder();
+```
+That's it - Mediabunny now uses the registered ProRes decoder automatically.