docs: add ATTRIBUTION.md for Recordly zoom animation code

ATTRIBUTION.md

@@ -0,0 +1,14 @@
+# Attribution
+
+OpenScreen thanks the following open-source projects for inspiring and contributing code:
+
+## Zoom & Pan Animation
+
+The zoom and pan animation system in OpenScreen was inspired by and ported from [Recordly](https://github.com/Recordly-dev/Recordly).
+
+The following functions in `src/components/video-editor/videoPlayback/` were ported from Recordly:
+
+- `mathUtils.ts` — `easeOutScreenStudio()`, `cubicBezier()`, and `clamp01()`
+- `zoomRegionUtils.ts` — zoom region strength, chaining, and connected pan transition logic
+
+We apologize for the omission and thank Recordly's maintainers for their excellent work.

README.md

@@ -94,6 +94,10 @@ _I'm new to open source, idk what I'm doing lol. If something is wrong please ra
 
 Contributions are welcome! If you’d like to help out or see what’s currently being worked on, take a look at the open issues and the [project roadmap](https://github.com/users/siddharthvaddem/projects/3) to understand the current direction of the project and find ways to contribute.
 
+## Attribution
+
+Third-party attributions are listed in [ATTRIBUTION.md](./ATTRIBUTION.md).
+
 ## License
 
 This project is licensed under the [MIT License](./LICENSE). By using this software, you agree that the authors are not liable for any issues, damages, or claims arising from its use.

src/components/video-editor/videoPlayback/mathUtils.ts

@@ -1,3 +1,6 @@
+// Ported from Recordly (https://github.com/Recordly-dev/Recordly).
+// See ATTRIBUTION.md for details.
+
 export function clamp01(value: number) {
 	return Math.max(0, Math.min(1, value));
 }

src/components/video-editor/videoPlayback/zoomRegionUtils.ts

@@ -1,3 +1,6 @@
+// Ported from Recordly (https://github.com/Recordly-dev/Recordly).
+// See ATTRIBUTION.md for details.
+
 import type { ZoomFocus, ZoomRegion } from "../types";
 import { ZOOM_DEPTH_SCALES } from "../types";
 import { TRANSITION_WINDOW_MS, ZOOM_IN_TRANSITION_WINDOW_MS } from "./constants";