Add Astro source for Indonesian language

[kevinalfito69]

Here’s the description for your new addition:

What does this PR do?

Add resource(s)

For resources

Description

Adds an Indonesian tutorial on Astro titled "Framework Astro: Mengembangkan Aplikasi dengan Mudah dan Cepat," which introduces developers to the Astro framework and guides them through building applications efficiently.

Why is this valuable (or not)?

This tutorial is valuable as it offers a detailed and localized resource for Indonesian developers, simplifying the learning curve for the Astro framework. It helps developers create fast and efficient web applications.

How do we know it's really free?

The tutorial is freely accessible on the author's website without any payment requirements or restricted access.

For book lists, is it a book? For course lists, is it a course? etc.

This is a course in the form of an article published on the Kevin Tekno blog.

Checklist:

• [x] Read our contributing guidelines.
• [x] Search for duplicates.
• [x] Include author(s) and platform where appropriate.
• [x] Put lists in alphabetical order, correct spacing.
• [x] Add needed indications (PDF, access notes, under construction).
• [x] Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

This version provides the necessary details for adding your new Astro tutorial to the resource list.

[eshellman]

it's one page article, not a book. re-open if I've missed something.