style: apply oxfmt baseline formatting across all source files (#25)

## Summary
- Run `oxfmt .` across the entire codebase to establish formatted baseline
- 299 files changed — mechanical formatting only, no logic changes
- Double quotes, semicolons, 2-space indent, trailing commas, 100 print width

Part 3/4 of [VA-851](https://linear.app/heygen/issue/VA-851/pre-migration-configure-eslint-prettier-and-conventional-commits)

## Test plan
- [x] `pnpm format:check` — all 426 files pass
- [x] `pnpm -r typecheck` — all packages pass
- [x] `pnpm build` — all packages build
- [x] All 348 tests pass

packages/core/src/runtime/adapters/lottie.test.ts

@@ -21,7 +21,11 @@ function createLottieWebAnim(opts?: { totalFrames?: number; frameRate?: number }
   };
 }
 
-function createDotLottiePlayer(opts?: { totalFrames?: number; frameRate?: number; duration?: number }) {
+function createDotLottiePlayer(opts?: {
+  totalFrames?: number;
+  frameRate?: number;
+  duration?: number;
+}) {
   return {
     play: vi.fn(),
     pause: vi.fn(),

packages/core/src/runtime/adapters/lottie.ts

@@ -156,7 +156,11 @@ export function createLottieAdapter(): RuntimeDeterministicAdapter {
 // ── Type guards ────────────────────────────────────────────────────────────────
 
 function isLottieWebAnimation(anim: unknown): anim is LottieWebAnimation {
-  return typeof anim === "object" && anim !== null && typeof (anim as LottieWebAnimation).goToAndStop === "function";
+  return (
+    typeof anim === "object" &&
+    anim !== null &&
+    typeof (anim as LottieWebAnimation).goToAndStop === "function"
+  );
 }
 
 function isDotLottiePlayer(anim: unknown): anim is DotLottiePlayer {

packages/core/src/runtime/adapters/waapi.test.ts

@@ -54,7 +54,9 @@ describe("waapi adapter", () => {
 
   it("handles animation that throws on pause", () => {
     const mockAnim = {
-      pause: vi.fn(() => { throw new Error("invalid state"); }),
+      pause: vi.fn(() => {
+        throw new Error("invalid state");
+      }),
       currentTime: 0,
     };
     (document as any).getAnimations = vi.fn(() => [mockAnim]);