Adds Rointe Heaters icons

[tggm]

Proposed change

Adds logo and icon for the Rointe Heaters custom integration (HACS).

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:
• Link to custom HACS integration: https://github.com/tggm/rointe-hacs

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)

[homeassistant]

Hi @tggm,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[frenck]

The icons provided in this PR seem different than the icon the brand uses, for example, on their socials:

The logo also seems different compared to the branding they use on their website:

[tggm]

Icons updated as requested.

[frenck]

Thanks, @tggm 👍