Use ESM format by default

[teslor]

Update project to use ESM syntax, as it becomes a standard for modern apps, also new versions of many packages require it.

Changes:

• Update scripts, TS files, tsconfig.json to use ESM.
• Use node: prefix for node packages as it's good practice; group node modules imports.
• Update @vitejs/plugin-vue & vite to latest ESM version.
• Leave CommonJS format for the preload script as it's not treated as ESM by default.

After making these changes, I noticed that there was already a similar PR #6. I guess it's time to make these updates.