fix(ui_kit): fix text align, add selection and update example for rich text builder

packages/wyatt_ui_kit/lib/src/components/rich_text_builder/rich_text_builder.dart

@@ -50,6 +50,7 @@ class RichTextBuilder extends RichTextBuilderComponent
           }) =>
               RichTextBuilderStyle(
             defaultStyle: themeExtension.defaultStyle,
+            styles: themeExtension.styles,
           ),
           customStyleFn: (context, {extra}) => RichTextBuilderStyle(
             defaultStyle: defaultStyle,
@@ -73,7 +74,6 @@ class RichTextBuilder extends RichTextBuilderComponent
         null,
       ),
     );
-
     final customParser = parser ??
         RichTextParser(
           nodeBuilder: (content, style) {
@@ -83,6 +83,9 @@ class RichTextBuilder extends RichTextBuilderComponent
                   content,
                   style: style,
                   softWrap: true,
+                  textHeightBehavior: const TextHeightBehavior(
+                    applyHeightToLastDescent: false,
+                  ),
                 ),
                 style: style,
               );
@@ -94,8 +97,12 @@ class RichTextBuilder extends RichTextBuilderComponent
           },
         );
 
-    return RichText(
-      text: root.toInlineSpan(customParser),
+    return SelectionArea(
+      child: Text.rich(
+        TextSpan(children: [root.toInlineSpan(customParser)]),
+        textHeightBehavior:
+            const TextHeightBehavior(applyHeightToLastDescent: false),
+      ),
     );
   }
 }

packages/wyatt_ui_kit/lib/src/components/rich_text_builder/rich_text_builder_theme_resolver.dart

@@ -16,7 +16,6 @@
 
 import 'package:flutter/material.dart';
 import 'package:wyatt_ui_components/wyatt_wyatt_ui_components.dart';
-import 'package:wyatt_ui_kit/src/domain/rich_text_builder_theme_extension.dart';
 import 'package:wyatt_ui_kit/wyatt_ui_kit.dart';
 
 class RichTextBuilderThemeResolver extends ThemeResolver<RichTextBuilderStyle,

packages/wyatt_ui_kit/lib/src/domain/domain.dart

@@ -15,5 +15,6 @@
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
 export './button_theme_extension/button_theme_extension.dart';
+export './card_theme_extension.dart';
 export './loader_theme_extension.dart';
-export 'card_theme_extension.dart';
+export './rich_text_builder_theme_extension.dart';