chore: add knip config for unused-code detection

Workspace-aware entry points plus ignore lists for script-only tools
and tools knip's binary resolution misses. Adds `npm run knip`.

knip.json

@@ -0,0 +1,100 @@
+{
+  "$schema": "./node_modules/knip/schema.json",
+  "workspaces": {
+    ".": {
+      "entry": ["scripts/**/*.{js,mjs,cjs,ts}"],
+      "project": ["scripts/**/*.{js,mjs,cjs,ts}"]
+    },
+    "packages/server": {
+      "entry": [
+        "src/server/index.ts",
+        "src/server/exports.ts",
+        "src/utils/tool-call-parsers.ts",
+        "scripts/**/*.{ts,mts,mjs,cjs,js}",
+        "src/**/*.test.ts",
+        "src/**/*.test.tsx",
+        "src/**/*.e2e.ts",
+        "src/**/*.e2e.tsx"
+      ],
+      "project": ["src/**/*.{ts,tsx}", "scripts/**/*.{ts,mts,mjs,cjs,js}"]
+    },
+    "packages/app": {
+      "entry": [
+        "index.ts",
+        "app.config.js",
+        "app/**/*.{ts,tsx}",
+        "src/**/*.test.{ts,tsx}",
+        "src/**/*.e2e.{ts,tsx}",
+        "e2e/**/*.{ts,tsx}",
+        "playwright.config.{ts,js}",
+        "vitest.config.{ts,js}"
+      ],
+      "project": ["**/*.{ts,tsx,js,jsx}"],
+      "ignore": [
+        "android/**",
+        "ios/**",
+        ".expo/**",
+        "dist/**",
+        "scripts/reset-project.js"
+      ]
+    },
+    "packages/cli": {
+      "entry": [
+        "src/index.ts",
+        "bin/paseo",
+        "src/**/*.test.{ts,tsx}",
+        "tests/**/*.{ts,tsx}"
+      ],
+      "project": ["src/**/*.{ts,tsx}", "tests/**/*.{ts,tsx}"]
+    },
+    "packages/relay": {
+      "entry": [
+        "src/index.ts",
+        "src/e2ee.ts",
+        "src/cloudflare-adapter.ts",
+        "src/**/*.test.ts"
+      ],
+      "project": ["src/**/*.ts"]
+    },
+    "packages/website": {
+      "entry": ["src/router.tsx", "vite.config.ts", "src/routes/**/*.tsx"],
+      "project": ["src/**/*.{ts,tsx}"],
+      "ignore": ["src/routeTree.gen.ts"]
+    },
+    "packages/desktop": {
+      "entry": ["src/main.ts", "src/preload.ts", "src/**/*.test.ts"],
+      "project": ["src/**/*.ts"]
+    },
+    "packages/highlight": {
+      "entry": ["src/index.ts", "src/**/*.test.ts"],
+      "project": ["src/**/*.ts"]
+    },
+    "packages/expo-two-way-audio": {
+      "entry": ["src/index.ts"],
+      "project": ["src/**/*.ts"]
+    }
+  },
+  "ignoreDependencies": [
+    "sherpa-onnx-node",
+    "@playwright/test",
+    "material-icon-theme",
+    "eas-cli",
+    "wait-on",
+    "concurrently",
+    "get-port-cli",
+    "patch-package",
+    "cross-env",
+    "expo-module-scripts"
+  ],
+  "ignoreBinaries": [
+    "expo-module",
+    "xed",
+    "eas",
+    "playwright",
+    "wrangler",
+    "powershell",
+    "tsx",
+    "vitest",
+    "open"
+  ]
+}