feat: Added Japanese translation (#25)

README.md

@@ -131,6 +131,10 @@ You can use [GitHub's theme context](https://github.blog/changelog/2021-11-24-sp
     <td><p align="center"><code>id</code></p></td>
     <td><p align="left">Indonesian (Bahasa Indonesia)</p></td>
   </tr>
+  <tr>
+    <td><p align="center"><code>ja</code></p></td>
+    <td><p align="left">Japanese (日本語)</p></td>
+  </tr>
   <tr>
     <td><p align="center"><code>ko</code></p></td>
     <td><p align="left">Korean (한국어)</p></td>

src/translations.ts

@@ -72,4 +72,18 @@ export const locales: Locales = {
     contributedToText: "ساهم في (العام الماضي)",
     rtlDirection: true,
   },
+  ja: {
+    titleCard: "{name}の GitHub 統計",
+    followersText: "フォロワー",
+    followingText: "フォロー中",
+    totalReposText: "トータルリポジトリ",
+    starsCountText: "星の数",
+    forksCountText: "フォークの数",
+    commitsCountText: "コミットの数",
+    totalPRText: "トータルPR",
+    totalPRMergedText: "トータルPRの マージ",
+    totalIssuesText: "トータル Issues",
+    contributedToText: "貢献したリポジトリ (昨年)",
+    rtlDirection: false,
+  },
 }