feat(ui_kit): add more control over flat button prefix/suffix color

packages/wyatt_ui_kit/lib/src/components/buttons/flat_button/flat_button_screen.dart

@@ -169,7 +169,11 @@ class FlatButtonScreen extends CubitScreen<ButtonCubit, ButtonState> {
                   mainAxisSize: mainAxisSize ?? MainAxisSize.min,
                   mainAxisAlignment: MainAxisAlignment.spaceBetween,
                   children: [
-                    if (style.foregroundColors?.color != null &&
+                    if (prefix != null &&
+                        (prefix is Icon?) &&
+                        ((prefix as Icon?)?.color != null)) ...[
+                      prefix!
+                    ] else if (style.foregroundColors?.color != null &&
                         prefix != null) ...[
                       ColorFiltered(
                         colorFilter: ColorFilter.mode(
@@ -208,7 +212,21 @@ class FlatButtonScreen extends CubitScreen<ButtonCubit, ButtonState> {
                       )
                     ],
                     Gap(style.padding?.vertical ?? 10),
-                    if (style.foregroundColors?.color != null &&
+                    if (suffix != null &&
+                        (suffix is Icon?) &&
+                        ((suffix as Icon?)?.color != null)) ...[
+                      suffix!
+                    ] else if (style.foregroundColors?.colors != null &&
+                        style.foregroundColors!.colors.isNotEmpty &&
+                        suffix != null) ...[
+                      ColorFiltered(
+                        colorFilter: ColorFilter.mode(
+                          style.foregroundColors!.colors.last,
+                          BlendMode.srcIn,
+                        ),
+                        child: suffix,
+                      )
+                    ] else if (style.foregroundColors?.color != null &&
                         suffix != null) ...[
                       ColorFiltered(
                         colorFilter: ColorFilter.mode(