docs: update README for v3

Update file structure section. Add concurrent command running method for Windows PowerShell users.
Update footer credit to acknowledge the contributions of other contributors.

resolve #113

README.md

@@ -58,7 +58,6 @@ Inside of AstroPaper, you'll see the following folders and files:
 │   ├── content/
 │   │   |  blog/
 │   │   |    └── some-blog-posts.md
-│   │   └── _schemas.ts
 │   │   └── config.ts
 │   ├── layouts/
 │   └── pages/
@@ -140,6 +139,8 @@ All commands are run from the root of the project, from a terminal:
 | `npm run cz`           | Commit code changes with commitizen                                                                                              |
 | `npm run lint`         | Lint with ESLint                                                                                                                 |
 
+> Warning! Windows PowerShell users may need to install the [concurrently package](https://www.npmjs.com/package/concurrently) if they want to [run diagnostics](https://docs.astro.build/en/reference/cli-reference/#astro-check) during development (`astro check --watch & astro dev`). For more info, see [this issue](https://github.com/satnaing/astro-paper/issues/113).
+
 ## ✨ Feedback & Suggestions
 
 If you have any suggestions/feedback, you can contact me via [my email](mailto:contact@satnaing.dev). Alternatively, feel free to open an issue if you find bugs or want to request new features.
@@ -150,4 +151,4 @@ Licensed under the MIT License, Copyright © 2023
 
 ---
 
-Made with 🤍 by [Sat Naing](https://satnaing.dev) 👨🏻‍💻
+Made with 🤍 by [Sat Naing](https://satnaing.dev) 👨🏻‍💻 and [contributors](https://github.com/satnaing/astro-paper/graphs/contributors).