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/compiler/timingCompiler.test.ts

@@ -1,5 +1,10 @@
 import { describe, it, expect } from "vitest";
-import { compileTimingAttrs, injectDurations, extractResolvedMedia, clampDurations } from "./timingCompiler.js";
+import {
+  compileTimingAttrs,
+  injectDurations,
+  extractResolvedMedia,
+  clampDurations,
+} from "./timingCompiler.js";
 
 describe("compileTimingAttrs", () => {
   it("adds data-end when data-start and data-duration are present on a video", () => {