feat(dashboard,types,js-sdk,ui): Add missing Price List features (#7856)

**What**
- Adds missing features to Price List domain
- Adds `StackedFocusModal` and `StackedDrawer` components that should replace SplitView across the project.
- Add Footer to FocusModal
- Adds missing js-sdk functions and types

**Note**
The DatePickers in the PriceLists forms do not work as intended atm. The component is broken, and needs to be fixed. I am working on a fix, but choose to move that work into a separate branch, to prevent this PR from getting bigger then it already is. Will update once the fixes have been merged.

packages/design-system/ui/src/components/button/button.tsx

@@ -41,7 +41,7 @@ const buttonVariants = cva({
       ),
     },
     size: {
-      small: "txt-compact-small-plus gap-x-1 px-2 py-1",
+      small: "txt-compact-small-plus gap-x-1.5 px-2 py-1",
       base: "txt-compact-small-plus gap-x-1.5 px-3 py-1.5",
       large: "txt-compact-medium-plus gap-x-1.5 px-4 py-2.5",
       xlarge: "txt-compact-large-plus gap-x-1.5 px-5 py-3.5",