refactor (fs): move all files and folders to the src folder except llswidget.dart file. Story: #1

- categorize the type and shape based components

Closes Story #1

lib/llswidget.dart

@@ -5,33 +5,33 @@ library llswidget;
 // copyright    2021 https://locatorlogic.com
 
 //exports button
-export 'package:llswidget/components/button/lls_button.dart';
-export 'package:llswidget/components/button/lls_button_bar.dart';
-export 'package:llswidget/components/button/lls_icon_button.dart';
-export 'package:llswidget/components/button/lls_social_button.dart';
+export 'package:llswidget/src/components/button/lls_button.dart';
+export 'package:llswidget/src/components/button/lls_button_bar.dart';
+export 'package:llswidget/src/components/button/lls_icon_button.dart';
+export 'package:llswidget/src/components/button/lls_social_button.dart';
 //exports button type
-export 'package:llswidget/types/lls_button_type.dart';
+export 'package:llswidget/src/components/button/type/lls_button_type.dart';
 // exports button shape
-export 'package:llswidget/shape/lls_button_shape.dart';
-export 'package:llswidget/shape/lls_icon_button_shape.dart';
+export 'package:llswidget/src/components/button/shape/lls_button_shape.dart';
+export 'package:llswidget/src/components/button/shape/lls_icon_button_shape.dart';
 //exports size
-export 'package:llswidget/size/lls_size.dart';
+export 'package:llswidget/src/lls_size.dart';
 //exports color
-export 'package:llswidget/colors/lls_color.dart';
+export 'package:llswidget/src/lls_color.dart';
 //exports position
-export 'package:llswidget/position/lls_position.dart';
+export 'package:llswidget/src/lls_position.dart';
 //exports list tile
-export 'package:llswidget/components/list_tile/lls_list_tile.dart';
+export 'package:llswidget/src/components/list_tile/lls_list_tile.dart';
 //exports tabs
-export 'package:llswidget/components/tabs/lls_segment_tabs.dart';
-export 'package:llswidget/components/tabs/lls_tabbar.dart';
-export 'package:llswidget/components/tabs/lls_tabbar_view.dart';
-export 'package:llswidget/components/tabs/lls_tabs.dart';
+export 'package:llswidget/src/components/tabs/lls_segment_tabs.dart';
+export 'package:llswidget/src/components/tabs/lls_tabbar.dart';
+export 'package:llswidget/src/components/tabs/lls_tabbar_view.dart';
+export 'package:llswidget/src/components/tabs/lls_tabs.dart';
 //exports label
-export 'package:llswidget/components/label/lls_label.dart'; 
+export 'package:llswidget/src/components/label/lls_label.dart'; 
 //exports label type
-export 'package:llswidget/types/lls_label_type.dart';
+export 'package:llswidget/src/components/label/type/lls_label_type.dart';
 //exports card
-export 'package:llswidget/components/card/lls_card.dart';
+export 'package:llswidget/src/components/card/lls_card.dart';
 //exports image overlay
-export 'package:llswidget/components/image/lls_image_overlay.dart';
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+export 'package:llswidget/src/components/image/lls_image_overlay.dart';
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