Add zh_CN translation

mods/bones/locale/bones.zh_CN.tr

@@ -0,0 +1,8 @@
+# textdomain: bones
+Bones=骨骸
+@1's old bones=@1的旧骨骸
+@1 died at @2.=@1在@2死亡。
+@1 died at @2, and dropped their inventory.=@1在@2死亡，丢掉了物品栏。
+@1 died at @2, and bones were placed.=@1在@2死亡，骨骸被放置。
+@1's fresh bones=@1的新鲜骨骸
+@1's bones=@1的骨骸