✨ Add icon picker for service icon

Co-authored-by: Meier Lukas <meierschlumpf@gmail.com>

src/types/iconSelector/iconSelectorItem.ts

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+export interface IconSelectorItem {
+  url: string;
+}

src/types/iconSelector/repositories/walkxcodeIconRepository.ts

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+export interface WalkxcodeRepositoryIcon {
+  name: string;
+}