いろんなフォントで「signal_box」変換
Zen Old Minchosignal_box
Yusei Magicsignal_box
M PLUS 1signal_box
Shippori Antiquesignal_box
Yuji Maisignal_box
Dela Gothic Onesignal_box
DotGothic16signal_box
Train Onesignal_box
Hira Minchosignal_box
Potta Onesignal_box
Reggae Onesignal_box
Sticksignal_box
Zen Kurenaidosignal_box
Kosugi Marusignal_box
Rampart Onesignal_box
Hachi Maru Popsignal_box
New Tegominsignal_box
RocknRoll Onesignal_box
Kaisei Decolsignal_box
「signal_box」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
