Add Polestar icons

[m0wlheld]

Proposed change

Add brand logo of Polestar car manufactoring company, as there is a custom integration for their API available (see https://github.com/leeyuentuen/polestar_api)

Sources:

• Social Media Channels (Instagram and Youtube) of Polestar.

Notes:

• icon.png: downscaled from 400x400
• icon2.png: upscaled from 400x400

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 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 #
• Link to code base pull request:
• Link to documentation pull request:
• Link to integration documentation on our website:

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)
• 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)

[frenck]

Thanks, @m0wlheld 👍

../Frenck