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/producer/tests/style-5-prod/meta.json

@@ -1,12 +1,7 @@
 {
   "name": "style-5-prod",
   "description": "Regression fixture imported from normalized style pack style-5-prod",
-  "tags": [
-    "style-regression",
-    "prod-style",
-    "slow",
-    "landscape"
-  ],
+  "tags": ["style-regression", "prod-style", "slow", "landscape"],
   "minPsnr": 30,
   "maxFrameFailures": 0,
   "minAudioCorrelation": 0.9,