將 Executable/ 目錄改為複數型態

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
Executables/ - 新增目錄說明檔

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
新增安裝 ann2srt 可執行檔目錄到可執行檔預設搜索目錄清單的 script

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
README - fix typo

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
README - 補充安裝說明

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
新增安裝相關檔案目錄

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>