Build/Windows: Update the Windows icon as svg and build derivatives from it

[Ayesh]

This is a follow-up to #12016. The author unfortunately deleted their php-src fork, which closed the PR. As mentioned in the previous PR, we have not updated the Windows icon in 21 years, and it look really dated:

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This takes the work from that PR, and the feedback it received to optimize the SVG.

In summary, this PR:

1. Takes the source SVG from php.net and adds and centers it into a 512px viewbox SVG with #777BB3 background. The source "php" text fill is then changed to #fff.
2. Adds a mkico.sh and an mkico.bat file to generate the .ico files from the source svg file. The icon file embeds pixel sizes from 16,24,32,48,64,128, and 256 squares. That's why the new ico file is larger than the existing one. In Update icon after 20 years #12016, it uses magick command, but this one uses the convert command which should be available in ImageMagick 6 in latest Ubuntu LTS version.
3. The updated ico file is white text on the PHP purple background, and not the old black text with white outline in the PHP purple background.

I did not copy the SVG files from php/web-php because it has rounded edges, and may only work out best for Windows app icons.

[cmb69]

Thank you so much!

[cmb69]

This is long overdue, and the PR looks good to me. Thank you @Ayesh and @imshvc.

[Ayesh]

Thank you for reviewing this.

Winget seems to have officially sourced imagemagick on version 7, and Ubuntu 24.04 with version 6. I adjusted the scripts to reflect it; Imagemagick 6 apparently deprecates using the convert command in favor of magick. Because we already have the script, I think we can keep it.

[cmb69]

Imagemagick 6 apparently deprecates using the convert command in favor of magick

I wasn't sure about that regarding other platform than Windows. On Windows, it was long time overdue, because of the system command convert, so this could confusion, and maybe worse.

Because we already have the script, I think we can keep it.

Agreed.

I'm going to merge this PR soon, so we can have the nice icons already for PHP 8.4.0alpha2.

[Ayesh]

I tested on Fedora 40 that comes with ImageMagic v7. convert still works but deprecated, and magick works. Shall we replace convert with magick?

[cmb69]

I have no idea about the usage of ImageMagick v6 vs. v7. Maybe stick with convert for now, but add a comment that magick convert might be needed for newer ImageMagick?

[Ayesh]

I think you are right, it makes sense to stick to convert for now. On Windows, IMv7 seems to be the default version.

So for the state this PR is in now, it should work on the current IM version (v7) on Windows, as well as current IM version (v6) on latest Debian/Ubuntu/etc plus on Fedora too, albeit with the deprecation notice. This probably won't matter as much after all, we might need to update the scripts anyway by the time we come across to change the icons :)

[Ayesh]

Yay, thanks for merging. Here are the comparison against the latest master branch and before it.