Set Constellation Command (#1565)

Original commits:

* create `SetConstCommand` class and translations

* (partially) functional `setconst` command

* fixed punctuation

* added success message

* implemented `SetConstCommand`

* added translation keys

* update keys

* refactor + automatic reload

* Nitpick (Co-authored-by: AnimeGitB <AnimeGitB@bigblueball.in>)

src/main/resources/languages/zh-CN.json

@@ -256,6 +256,14 @@
       "success": "消息已发送。",
       "description": "向玩家以服务器的身份发送消息。如果没有指定目标，则向服务器的全部玩家发送"
     },
+    "setConst": {
+      "range_error": "Constellation level must be between 0 and 6.",
+      "level_error": "Invalid constellation level.",
+      "fail": "Failed to set constellation.",
+      "failed_success": "Constellations for %s have been set to %s. Please reload scene to see changes.",
+      "success": "Constellations for %s have been set to %s.",
+      "description": "Sets constellation level for your current active character"
+    },
     "setFetterLevel": {
       "range_error": "好感度等级必须在 0-10 之间。",
       "success": "好感度已设为 %s 级。",