docs: add monorepo template

[eldemcan]

Please make sure all the requirements are satisfied, otherwise the PR could be closed without further notice.

We provided a link to a template repository pre-configured to support features like server-side rendering, static page generation, single-page application hosting, and API provision.

Checklist

• [x] Title as described.
• [x] Make sure you put things in the right category.
• [x] The description of your item should be a sentence with less than 24 words.
• [x] Avoid using links and parentheses in description.
• [x] Omit unnecessary words already provided in the context (e.g. for Vite, a Vite plugin).
• [x] Use proper case for terms (e.g. GitHub, TypeScript, ESLint, etc.)
• [x] When mentioning tools, omit versions whenever possible (e.g. use TypeScript instead of TypeScript 4.x, but keep Vue 2 and Vue 3 as they're incompatible).
• [x] When mentioning package names, use quotes whenever possible.
• [x] Always add your items to the end of a list.

Plugins/Tools

• [ ] The plugin/tool is working with Vite 2.x and onward.
• [ ] The project is Open Source.
• [ ] The project follows the Vite Plugins Conventions.
• [ ] The plugin uses Vite-specific hooks and can't be implemented as a Compatible Rollup Plugin.
• [ ] The repo should be at least 30 days old.
• [ ] The documentation is in English.
• [ ] The project is active and maintained (inactive projects for longer 6 months will be removed without further notice).
• [ ] The project accepts contributions.
• [ ] Not a commercial product.

Starter Templates

• [x] The starter template is working with Vite 2.x and onward.
• [x] The documentation is in English.
• [x] The starter template must provide enough instructions / documentation about how to start up and what's included.
• [x] The repo should be at least 30 days old.
• [x] Should be differentiable from the existing starter templates.

Apps/Websites

• [ ] The website is available without errors and load in a reasonable amount of time.
• [ ] The website must be Open Source and showing it's using Vite intensively.
• [ ] The website is original and not too simple. For that reason, blogs and simple landing pages are rejected.