Add icon for Floorp

[ganelonhb]

Closes #3637

New Icon:

[SmartFinn]

Thanks for your contribution. There are a few major issues with the icon:

1. Objects on the icon do not have Pixel alignment.
2. The icon doesn't match the original shape. Your icon has a rounded hexagon, instead of a hexagon with rounded corners, like the original one.
3. Missing shadows under the shape.

Please, let me know if you can't fix these issues.

[ganelonhb]

Thanks for your contribution. There are a few major issues with the icon:

1. Objects on the icon do not have [Pixel alignment](https://github.com/PapirusDevelopmentTeam/papirus-icon-theme/wiki/Icon-creation-basics#pixel-alignment).

2. The icon doesn't match the original shape. Your icon has a rounded hexagon, instead of a hexagon with rounded corners, like the original one.

3. Missing shadows under the shape.

Please, let me know if you can't fix these issues.

Yeah, you're right. My bad. I'll take a crack at it this weekend.

[ganelonhb]

New preview:

Let me know if any new changes are requested. Maybe the colors?

[ganelonhb]

It still doesn't quite add up to the standards. I'll finish this on the weekend like I had originally stated.