feat: i18n, page title

(cherry picked from commit 0d9fc72bee009c591400055725680a6a0f5a9c83)

src/i18n/i18nKey.ts

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+enum I18nKey {
+    home = "home",
+    about = "about",
+    archive = "archive",
+
+    tags = "tags",
+    categories = "categories",
+    recentPosts = "recentPosts",
+
+    comments = "comments",
+
+    untitled = "untitled",
+    uncategorized = "uncategorized",
+    noTags = "noTags",
+
+    wordCount = "wordCount",
+    wordsCount = "wordsCount",
+    minuteCount = "minuteCount",
+    minutesCount = "minutesCount",
+    postCount = "postCount",
+    postsCount = "postsCount",
+
+    primaryColor = "primaryColor",
+}
+
+export default I18nKey;

src/i18n/languages/en.ts

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+import type { Translation } from "../translation.ts";
+import Key from "../i18nKey.ts";
+
+export const en: Translation = {
+    [Key.home]: "Home",
+    [Key.about]: "About",
+    [Key.archive]: "Archive",
+
+    [Key.tags]: "Tags",
+    [Key.categories]: "Categories",
+    [Key.recentPosts]: "Recent Posts",
+
+    [Key.comments]: "Comments",
+
+    [Key.untitled]: "Untitled",
+    [Key.uncategorized]: "Uncategorized",
+    [Key.noTags]: "No Tags",
+
+    [Key.wordCount]: "word",
+    [Key.wordsCount]: "words",
+    [Key.minuteCount]: "minute",
+    [Key.minutesCount]: "minutes",
+    [Key.postCount]: "post",
+    [Key.postsCount]: "posts",
+
+    [Key.primaryColor]: "Primary Color",
+};

src/i18n/languages/zh_CN.ts

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+import type { Translation } from "../translation.ts";
+import Key from "../i18nKey.ts";
+
+export const zh_CN: Translation = {
+    [Key.home]: "主页",
+    [Key.about]: "关于",
+    [Key.archive]: "归档",
+
+    [Key.tags]: "标签",
+    [Key.categories]: "分类",
+    [Key.recentPosts]: "最新文章",
+
+    [Key.comments]: "评论",
+
+    [Key.untitled]: "无标题",
+    [Key.uncategorized]: "未分类",
+    [Key.noTags]: "无标签",
+
+    [Key.wordCount]: "字",
+    [Key.wordsCount]: "字",
+    [Key.minuteCount]: "分钟",
+    [Key.minutesCount]: "分钟",
+    [Key.postCount]: "篇文章",
+    [Key.postsCount]: "篇文章",
+
+    [Key.primaryColor]: "主题色",
+};

src/i18n/languages/zh_TW.ts

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+import type { Translation } from "../translation.ts";
+import Key from "../i18nKey.ts";
+
+export const zh_TW: Translation = {
+    [Key.home]: "首頁",
+    [Key.about]: "關於",
+    [Key.archive]: "彙整",
+
+    [Key.tags]: "標籤",
+    [Key.categories]: "分類",
+    [Key.recentPosts]: "最新文章",
+
+    [Key.comments]: "評論",
+
+    [Key.untitled]: "無標題",
+    [Key.uncategorized]: "未分類",
+    [Key.noTags]: "無標籤",
+
+    [Key.wordCount]: "字",
+    [Key.wordsCount]: "字",
+    [Key.minuteCount]: "分鐘",
+    [Key.minutesCount]: "分鐘",
+    [Key.postCount]: "篇文章",
+    [Key.postsCount]: "篇文章",
+
+    [Key.primaryColor]: "主題色",
+};

src/i18n/translation.ts

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+import {en} from "./languages/en.ts";
+import {zh_TW} from "./languages/zh_TW.ts";
+import {zh_CN} from "./languages/zh_CN.ts";
+import type I18nKey from "./i18nKey.ts";
+import {getConfig} from "../utils/config-utils.ts";
+
+export type Translation = {
+    [K in I18nKey]: string;
+}
+
+const defaultTranslation = en;
+
+const map: { [key: string]: Translation } = {
+    "en": en,
+    "en_us": en,
+    "en_gb": en,
+    "en_au": en,
+    "zh_cn": zh_CN,
+    "zh_tw": zh_TW,
+}
+
+export function getTranslation(lang: string): Translation {
+    lang = lang.toLowerCase();
+    return map[lang] || defaultTranslation;
+}
+
+export function i18n(key: I18nKey): string {
+    const lang = getConfig().lang || "en";
+    return getTranslation(lang)[key];
+}