feat: Swap flow for Pay Anything. (#2489)

* feat: Swap flow for Pay Anything. [WIP]

* feat: Pay Anything Swap Flow [WIP]

* feat: Pay anything swap flow [WIP]
- Add fiat values for send and receive amounts to swap details confirmation bottomsheet

* feat: Pay anything swap flow [WIP]
- Switch exchangeviewmodel back to factory
- Expand address box to fill width

* Handle second swipe to swap cta

* Add fiat for receive amount

* Scope Observers for bottomsheets and add validator

* fix: Repeated instances issue for exchangeVM

* fix: Estimated fee and balance not correctly updating after wallet switching occurs

* fix: Available balance not updating properly after wallet switching

* Fix: Give wallet some time to open before populating send info

---------

Co-authored-by: OmarHatem <omarh.ismail1@gmail.com>

lib/src/widgets/standard_slide_button_widget.dart

@@ -11,6 +11,8 @@ class StandardSlideButton extends StatefulWidget {
     this.height = 48.0,
     required this.currentTheme,
     required this.accessibleNavigationModeButtonText,
+    this.tileBackgroundColor,
+    this.knobColor,
   }) : super(key: key);
 
   final VoidCallback onSlideComplete;
@@ -18,7 +20,9 @@ class StandardSlideButton extends StatefulWidget {
   final double height;
   final MaterialThemeBase currentTheme;
   final String accessibleNavigationModeButtonText;
-
+  final Color? tileBackgroundColor;
+  final Color? knobColor;
+  
   @override
   StandardSlideButtonState createState() => StandardSlideButtonState();
 }
@@ -57,7 +61,7 @@ class StandardSlideButtonState extends State<StandardSlideButton> {
                 height: widget.height,
                 decoration: BoxDecoration(
                   borderRadius: BorderRadius.circular(10),
-                  color: tileBackgroundColor,
+                  color: widget.tileBackgroundColor ?? tileBackgroundColor,
                 ),
                 child: Stack(
                   alignment: Alignment.centerLeft,
@@ -97,7 +101,7 @@ class StandardSlideButtonState extends State<StandardSlideButton> {
                           height: widget.height - 8,
                           decoration: BoxDecoration(
                             borderRadius: BorderRadius.circular(10),
-                            color: Theme.of(context).colorScheme.surface,
+                            color: widget.knobColor ?? Theme.of(context).colorScheme.surface,
                           ),
                           alignment: Alignment.center,
                           child: Icon(