Add geizhals logo and icon for custom_integration

[CommanderRedYT]

Proposed change

I am currently writing a custom integration for geizhals. As it is a custom integration, it does not have the same problems as the old integration which was removed here: home-assistant#2381

These are also updated images, meaning they are not the same as here: home-assistant#1898

The custom integration can be found here (at this point, it is still WIP, but should be usable already): https://github.com/CommanderRedYT/homeassistant-geizhals-integration

Type of change

• Add a new logo or icon for a new core integration
• Add a missing icon or logo for an existing core integration
• Add a new logo or icon for a custom integration (custom component)
  • I've added a link to my custom integration repository in the PR description
• Replace an existing icon or logo with a higher quality version
• Replace an existing icon or logo after a branding change
• Removing an icon or logo

Additional information

• This PR fixes or closes issue: fixes
• Link to code base pull request:
• Link to documentation pull request:
• Link to integration documentation on our website:
• Link to custom integration repository: https://github.com/CommanderRedYT/homeassistant-geizhals-integration

Checklist

• The added/replaced image(s) are PNG
• Icon image size is 256x256px (icon.png)
• hDPI icon image size is 512x512px for (icon@2x.png) -> No hDPI image
• Logo image size has min 128px, but max 256px, on the shortest side (logo.png)
• hDPI logo image size has min 256px, but max 512px, on the shortest side (logo@2x.png) -> No hDPI image