feat: add Spanish i18n (#157)

* Create es.ts

Added Spanish translation for site content and interface elements.

* Update translation.ts

Added Spanish (es) translation support to the language configuration.

src/i18n/languages/es.ts

@@ -0,0 +1,38 @@
+import Key from '../i18nKey'
+import type { Translation } from '../translation'
+
+export const es: Translation = {
+  [Key.home]: 'Inicio',
+  [Key.about]: 'Sobre mí',
+  [Key.archive]: 'Archivo',
+  [Key.search]: 'Buscar',
+
+  [Key.tags]: 'Etiquetas',
+  [Key.categories]: 'Categorías',
+  [Key.recentPosts]: 'Publicaciones recientes',
+
+  [Key.comments]: 'Comentarios',
+
+  [Key.untitled]: 'Sin título',
+  [Key.uncategorized]: 'Sin categoría',
+  [Key.noTags]: 'Sin etiquetas',
+
+  [Key.wordCount]: 'palabra',
+  [Key.wordsCount]: 'palabras',
+  [Key.minuteCount]: 'minuto',
+  [Key.minutesCount]: 'minutos',
+  [Key.postCount]: 'publicación',
+  [Key.postsCount]: 'publicaciones',
+
+  [Key.themeColor]: 'Color del tema',
+
+  [Key.lightMode]: 'Claro',
+  [Key.darkMode]: 'Oscuro',
+  [Key.systemMode]: 'Sistema',
+
+  [Key.more]: 'Más',
+
+  [Key.author]: 'Autor',
+  [Key.publishedAt]: 'Publicado el',
+  [Key.license]: 'Licencia',
+}

src/i18n/translation.ts

@@ -1,10 +1,11 @@
 import { siteConfig } from '../config'
 import type I18nKey from './i18nKey'
 import { en } from './languages/en'
+import { es } from './languages/es'
 import { ja } from './languages/ja'
+import { ko } from './languages/ko'
 import { zh_CN } from './languages/zh_CN'
 import { zh_TW } from './languages/zh_TW'
-import { ko } from './languages/ko'
 
 export type Translation = {
   [K in I18nKey]: string
@@ -13,6 +14,7 @@ export type Translation = {
 const defaultTranslation = en
 
 const map: { [key: string]: Translation } = {
+  es: es,
   en: en,
   en_us: en,
   en_gb: en,
@@ -32,4 +34,4 @@ export function getTranslation(lang: string): Translation {
 export function i18n(key: I18nKey): string {
   const lang = siteConfig.lang || 'en'
   return getTranslation(lang)[key]
-}
+}