refactor!: execString for push/replace message return content string …

…only. closes #11

TODO

@@ -25,6 +25,7 @@ features:
   ✔ formatString @script should not add space if following is symbol char @done(24-08-20 21:15)
   ✔ add LatestResult public readonly field @done(24-08-20 22:04)
   ✔ refactor!: @script and -> use "content" name as input argument instead "result" @done(24-08-21 20:37)
+  ✔ refactor!: execString for push/replace message return content string only @done(24-08-21 20:38)
 bugs:
   glitch 当ctrl+c中断后的文字不会被clear,应ctrl+c会新起两行一行是单独一个ctrl+c
   ✔ 提示消息被过滤掉了空行 @done(24-06-16 17:58)