feat: handle extensionPack and extensionDependencies when installing extensions

[benoitf]

What does this PR do?

Install other extensions if extension has extensionDependencies field
Handle extension that provides extensionPack elements

example:

{
  "name": "extension-pack-example",
  "version": "0.1.1",
  "publisher": "fbenoit",
  "displayName": "Red Hat Extension Pack",
  "description": "A collection of extensions published by Red Hat",
  "license": "apache-2.0",
  "icon": "extension.png",
  "keywords": [
    "Red Hat"
  ],
  "categories": [
    "Extension Packs"
  ],
  "engines": {
    "podman-desktop": "^1.0.0"
  },
  "extensionPack": [
    "redhat.redhat-sandbox",
    "redhat.openshift-local"
  ]
}

when deploying this example both redhat.redhat-sandbox and redhat.openshift-local will be deployed

Screenshot/screencast of this PR

qRQwPBUpAd.mp4

What issues does this PR fix or reference?

fixes #2829
fixes #2828

How to test this PR?

Unit tests provided

You can also try by installing quay.io/fbenoit/ext-pack-sample extension (you'll get OpenShift Sandbox and OpenShift Local extensions if not already installed)

[lstocchi]

Tested and works fine but what happens if the dependency has a dependency itself?

Extension A depends on B, but B depends on C?
Would C be installed when installing A?

[benoitf]

Hello @lstocchi I've changed logic to get all transitive dependencies

You can try to install quay.io/fbenoit/ext-a (ext A depends on B that depends on C)

for that you need to tweak the 'catalog'

+++ b/packages/main/src/plugin/extensions-catalog/extensions-catalog.ts
@@ -31,7 +31,8 @@ import type {
  * Allow to grab content from the online extensions catalog.
  */
 export class ExtensionsCatalog {
-  public static readonly ALL_EXTENSIONS_URL = 'https://registry.podman-desktop.io/api/extensions.json';
+  public static readonly ALL_EXTENSIONS_URL =
+    'https://raw.githubusercontent.com/benoitf/podman-desktop-catalog/main/registry.json';

[lstocchi]

LGTM!! Thanks 🚀