Adding ArcitcSpas logo and icons

[greg-szabo]

Proposed change

Added icons and logos for the ArcitcSpas hot tub brand.

Type of change

• [X] 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 opened up a PR for my custom integration on the Home Assistant Python wheels repository
• [ ] Replace an existing icon or logo with a higher quality version
• [ ] Removing an icon or logo

Additional information

• This PR fixes or closes issue: fixes #N/A (Community forum features request)
• Link to code base pull request: https://github.com/home-assistant/core/pull/105474
• Link to documentation pull request: https://github.com/home-assistant/home-assistant.io/pull/30438
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/arcticspa/ (not active until document PR is merged)

Checklist

• [X] The added/replaced image(s) are PNG
• [X] Icon image size is 256x256px (icon.png)
• [X] hDPI icon image size is 512x512px for ([email protected])
• [X] Logo image size has min 128px, but max 256px, on the shortest side (logo.png)
• [X] hDPI logo image size has min 256px, but max 512px, on the shortest side ([email protected])