Esbuild the html and json extensions

Switches from webpack to esbuild

extensions/json-language-features/server/tsconfig.browser.json

@@ -0,0 +1,7 @@
+{
+	"extends": "./tsconfig.json",
+	"exclude": [
+		"./src/node/**",
+		"./src/test/**"
+	]
+}