criada a tela attendance_list_screen.dart, about_screen.dart e main_procedures_screen.dart

lib/widgets/text_default.dart

@@ -7,18 +7,21 @@ class TextDefault extends StatelessWidget {
   double fontSize;
   Color  color;
   FontWeight fontWeigth;
+  TextAlign textAlign;
 
   TextDefault({
     required this.text,
     this.fontSize = 20.0,
     this.color = ColorPalette.gray,
-    this.fontWeigth = FontWeight.normal
+    this.fontWeigth = FontWeight.normal,
+    this.textAlign = TextAlign.start
 });
 
   @override
   Widget build(BuildContext context) {
     return Text(
       text,
+      textAlign: textAlign,
       style: TextStyle(
         fontSize: fontSize,
         fontWeight: fontWeigth,