Add poetry logo

[koxudaxi]

PyCharm can show a log for the package manager plugin.
The places are Plugin Market and config panels of Interpreter. I attached the screenshots examples at the end of the issue.

@abn
Can we use the official poetry log in this plugin?
I couldn't find the license of the logo and the original image.
if we can't use the image then I close this issue.

[abn]

@koxudaxi I do not foresee an issue for using the logo for this. Although you might need to confirm with @sdispater regarding this and for the source image.

[koxudaxi]

@sdispater
Would you mind if we use the logo for this plugin?

If I have to create an issue on the poetry project then I move this issue to it.