Update kdevelop app icon to latest breeze-icons version

Summary:
Also
* add SVG variant
* add 512px & 1024px variants as useful with HiDPI

Reviewers: #kdevelop, arrowd

Reviewed By: arrowd

Subscribers: arrowd, kdevelop-devel

Tags: #kdevelop

Differential Revision: https://phabricator.kde.org/D17839