Add pi-browser-harness ext (vendored 0.11.0, sharp dropped)

extensions/pi-browser-harness/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules", "dist"]
+}