feat: Adding badges and inventory to external profile

spec.json

src/api/core/OpenAPI.ts

src/api/models/ChallengeTemplateDTO.ts

src/api/services/BadgeService.ts

src/api/services/GoalService.ts

src/api/services/ItemService.ts

src/components/UserProfile/ExternalProfile.vue

src/components/UserProfile/MyProfile.vue