feat(dashboard): DataGrid improvements [4/4] (#8798)

**What**
- Changes cell state strategy from tracking from lazy to eager. This has required some changes to the API of the DataGrid component, and createDataGridColumnHelper function.
- Displays error messages in both affected cells and their rows. The row indicator also provides an option to quickly jump to an error.
- Allows the user to hide all rows and columns that don't have errors, to help quickly get an overview of the errors in a large grid.
- The first column of a DataGrid is now pinned, making it easier for a user to tell which entity they are editing.
- Fixes and improvements to column visibility menu.
- Adds a shortcuts modal that explains the different available keyboard commands.
- Updates `@tanstack/react-table` to the latest version.

Resolves CC-269

packages/admin-next/dashboard/src/lib/form-helpers.ts

@@ -30,15 +30,17 @@ export function transformNullableFormData<
   }, {} as K extends true ? Nullable<T> : Optional<T>)
 }
 
-export function transformNullableFormNumber(
+export function transformNullableFormNumber<K extends boolean = true>(
   value?: string | number,
-  nullify = true
-) {
+  nullify: K = true as K
+): K extends true ? number | null : number | undefined {
   if (
     typeof value === "undefined" ||
     (typeof value === "string" && value.trim() === "")
   ) {
-    return nullify ? null : undefined
+    return (nullify ? null : undefined) as K extends true
+      ? number | null
+      : number | undefined
   }
 
   if (typeof value === "string") {