chore: replace biome with oxc (oxfmt + oxlint)

- Remove @biomejs/biome from root and packages/expo-two-way-audio
- Delete biome.json
- Add .oxfmtrc.json (migrated from biome via oxfmt --migrate=biome)
- Add .oxlintrc.json with curated rule set: react, react-perf,
  react-hooks, typescript, unicorn, oxc, import, promise
  - Rules target functional gotchas, untyped code, perf issues,
    deep JSX, nested ternaries, complexity, unused code
  - Noisy stylistic rules explicitly disabled
- Add npm scripts: lint, lint:fix (oxfmt replaces format/format:check)
- Update CI to run oxfmt --check

Lint is wired up but not enforced — all rules at warn. Baseline:
6040 warnings, 0 errors.

.github/workflows/ci.yml

@@ -15,14 +15,14 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm install
 
       - name: Check formatting
-        run: npx biome format .
+        run: npx oxfmt --check .
 
   typecheck:
     runs-on: ubuntu-latest
@@ -31,8 +31,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm install
@@ -58,8 +58,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Fetch origin/main (worktree tests)
         run: git fetch --no-tags origin main:refs/remotes/origin/main
@@ -88,8 +88,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm install
@@ -126,8 +126,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm install
@@ -148,8 +148,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm install
@@ -191,8 +191,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm install
@@ -210,8 +210,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
-          cache: 'npm'
+          node-version: "20"
+          cache: "npm"
 
       - name: Install dependencies
         run: npm install
@@ -225,6 +225,6 @@ jobs:
       - name: Run CLI tests
         run: npm run test --workspace=@getpaseo/cli
         env:
-          PASEO_LOCAL_SPEECH_AUTO_DOWNLOAD: '0'
-          PASEO_DICTATION_ENABLED: '0'
-          PASEO_VOICE_MODE_ENABLED: '0'
+          PASEO_LOCAL_SPEECH_AUTO_DOWNLOAD: "0"
+          PASEO_DICTATION_ENABLED: "0"
+          PASEO_VOICE_MODE_ENABLED: "0"