[Icons] Fix aliases support when fetching multiples icons with Iconify

[Kocal]

Q	A
Bug fix?	yes
New feature?	no
Issues	Fix #...
License	MIT

Use case:

1. I need to download three icons
2. I go to https://ux.symfony.com/icons, and select "Material Design Icons"
3. I search for capsule, sign and glasses
4. https://ux.symfony.com/icons suggests me to run symfony console ux:icon:import mdi:capsule, symfony console ux:icon:import mdi:sign and symfony console ux:icon:import mdi:glasses (can be shortened to symfony console ux:icon:import mdi:capsule mdi:sign mdi:glasses)
5. But it fails, it tells me icons mdi:capsule and mdi:sign do not exist

In fact, they exist, but those icons are alias pointing to another icon, see https://api.iconify.design/mdi.json?icons=capsule%2Cglasses%2Csign:

{
  "prefix": "mdi",
  "lastModified": 1718880438,
  "aliases": {
    "capsule": {
      "parent": "pill"
    },
    "sign": {
      "parent": "draw"
    }
  },
  "width": 24,
  "height": 24,
  "icons": {
    "pill": {
      "body": "<path fill=\"currentColor\" d=\"m4.22 11.29l7.07-7.07a6.01 6.01 0 0 1 8.49 0c2.34 2.34 2.34 6.14 0 8.49l-7.07 7.07c-2.35 2.34-6.15 2.34-8.49 0a6.01 6.01 0 0 1 0-8.49m1.42 1.42a3.98 3.98 0 0 0-1.04 3.86l5.99-5.98l4.24 4.24l3.53-3.54a3.98 3.98 0 0 0 0-5.65a3.98 3.98 0 0 0-5.65 0z\"/>"
    },
    "glasses": {
      "body": "<path fill=\"currentColor\" d=\"M3 10c-.24 0-.45.09-.59.25c-.14.15-.2.37-.17.61l.5 2.99C2.82 14.5 3.4 15 4 15h3c.64 0 1.36-.56 1.5-1.18l1.06-3.19c.04-.13.01-.32-.06-.44c-.11-.12-.28-.19-.5-.19zm4 7H4C2.38 17 .96 15.74.76 14.14l-.5-2.99C.15 10.3.39 9.5.91 8.92S2.19 8 3 8h6c.83 0 1.58.35 2.06.96c.11.15.21.31.29.49c.43-.09.87-.09 1.29 0c.08-.18.18-.34.3-.49C13.41 8.35 14.16 8 15 8h6c.81 0 1.57.34 2.09.92c.51.58.75 1.38.65 2.19l-.51 3.07C23.04 15.74 21.61 17 20 17h-3c-1.56 0-3.08-1.19-3.46-2.7l-.9-2.71c-.38-.28-.91-.28-1.29 0l-.92 2.78C10.07 15.82 8.56 17 7 17m8-7c-.22 0-.39.07-.5.19c-.08.12-.1.31-.05.51l1.01 3.05c.18.69.9 1.25 1.54 1.25h3c.59 0 1.18-.5 1.25-1.11l.51-3.07c.03-.2-.03-.42-.17-.57A.77.77 0 0 0 21 10z\"/>"
    },
    "draw": {
      "body": "<path fill=\"currentColor\" d=\"M9.75 20.85c1.78-.7 1.39-2.63.49-3.85c-.89-1.25-2.12-2.11-3.36-2.94A9.8 9.8 0 0 1 4.54 12c-.28-.33-.85-.94-.27-1.06c.59-.12 1.61.46 2.13.68c.91.38 1.81.82 2.65 1.34l1.01-1.7C8.5 10.23 6.5 9.32 4.64 9.05c-1.06-.16-2.18.06-2.54 1.21c-.32.99.19 1.99.77 2.77c1.37 1.83 3.5 2.71 5.09 4.29c.34.33.75.72.95 1.18c.21.44.16.47-.31.47c-1.24 0-2.79-.97-3.8-1.61l-1.01 1.7c1.53.94 4.09 2.41 5.96 1.79m11.09-15.6c.22-.22.22-.58 0-.79l-1.3-1.3a.56.56 0 0 0-.78 0l-1.02 1.02l2.08 2.08M11 10.92V13h2.08l6.15-6.15l-2.08-2.08z\"/>"
    }
  }
}

But now, imagine I have ~120 icons to import but only ~80 of them have been imported... 😅

This PR add support for using aliases when fetching multiple icons (it already exist, but when fetching one icon).

[smnandre]

Thanks for this fix @Kocal!

[Kocal]

No one was sleeping or what? 😆

[Kocal]

Updated!

[smnandre]

Thanks a lot Kocal!