feat(01-01): add TypeScript interfaces and configure ESLint for Nuxt

- shared/types/index.ts with tightened Project, Technology, TechStack, Testimonial, FAQ interfaces
- technologies, category, date now required on Project (was optional)
- FAQ uses i18n keys (questionKey, answerKey, featuresKey)
- Replace old eslint.config.ts with Nuxt-compatible eslint.config.mjs

shared/types/index.ts

@@ -0,0 +1,59 @@
+export interface ProjectButton {
+  title: string
+  link: string
+}
+
+export interface Project {
+  id: string
+  image: string
+  technologies: string[]
+  category: string
+  date: string
+  featured?: boolean
+  buttons?: ProjectButton[]
+  gallery?: string[]
+  demoUrl?: string
+  githubUrl?: string
+  features?: string[]
+}
+
+export interface Technology {
+  name: string
+  level: 'Beginner' | 'Intermediate' | 'Advanced'
+  image: string
+}
+
+export interface TechStack {
+  programming: Technology[]
+  front: Technology[]
+  database: Technology[]
+  devtools: Technology[]
+  operating_systems: Technology[]
+  socials: Technology[]
+}
+
+export interface Testimonial {
+  name: string
+  role: string
+  company: string
+  avatar: string
+  rating: number
+  content: string
+  date: string
+  platform: string
+  featured?: boolean
+  project_type: string
+  results?: string[]
+}
+
+export interface TestimonialsStats {
+  totalReviews: number
+  averageRating: number
+  projectsCompleted: number
+}
+
+export interface FAQ {
+  questionKey: string
+  answerKey: string
+  featuresKey: string
+}