add "type": "module" to solid spa templates

[huseeiin]

when you uncomment solid-devtools,

import { defineConfig } from "vite";
import solidPlugin from "vite-plugin-solid";
import devtools from "solid-devtools/vite";

export default defineConfig({
  plugins: [
    /* 
    Uncomment the following line to enable solid-devtools.
    For more info see https://github.com/thetarnav/solid-devtools/tree/main/packages/extension#readme
    */
    devtools(),
    solidPlugin(),
  ],
  server: {
    port: 3000,
  },
  build: {
    target: "esnext",
  },
});

vite is gonna crash because it cannot resolve solid-devtools without "type": "module"