Projectalice-sk

allow optional icon definition on skill creation

**Full Changelog**: https://github.com/project-alice-assistant/ProjectAliceSkillKit/compare/2.2.3...2.2.4

**Full Changelog**: https://github.com/project-alice-assistant/ProjectAliceSkillKit/compare/2.2.2...2.2.3

Adding requests stubs for skill checking

**Full Changelog**: https://github.com/project-alice-assistant/ProjectAliceSkillKit/compare/2.2.1...2.2.2

**Full Changelog**: https://github.com/project-alice-assistant/ProjectAliceSkillKit/compare/2.1.2...2.2.1

Fixed typo for new device type creation

Enable creation of widgets/devices/nodes for existing skills