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

eslint.config.ts

@@ -1,22 +0,0 @@
-import { globalIgnores } from 'eslint/config'
-import { defineConfigWithVueTs, vueTsConfigs } from '@vue/eslint-config-typescript'
-import pluginVue from 'eslint-plugin-vue'
-import skipFormatting from '@vue/eslint-config-prettier/skip-formatting'
-
-// To allow more languages other than `ts` in `.vue` files, uncomment the following lines:
-// import { configureVueProject } from '@vue/eslint-config-typescript'
-// configureVueProject({ scriptLangs: ['ts', 'tsx'] })
-// More info at https://github.com/vuejs/eslint-config-typescript/#advanced-setup
-
-export default defineConfigWithVueTs(
-  {
-    name: 'app/files-to-lint',
-    files: ['**/*.{ts,mts,tsx,vue}'],
-  },
-
-  globalIgnores(['**/dist/**', '**/dist-ssr/**', '**/coverage/**']),
-
-  pluginVue.configs['flat/essential'],
-  vueTsConfigs.recommended,
-  skipFormatting,
-)