Add enterprise subscription requirement

Author: djhi

docs_headless/src/content/docs/AutoPersistInStoreBase.md

@@ -16,6 +16,8 @@ The temporary form data is only saved when the user navigates away from the page
 
 Saved data is not sent to the server. It is only persisted using the [store](https://marmelab.com/ra-core/store/) and is removed when the user logs out.
 
+This feature requires a valid is an [Enterprise Edition](https://marmelab.com/ra-enterprise/) subscription.
+
 ### Usage
 
 Add `<AutoPersistInStoreBase>` inside a react-admin form:

docs_headless/src/content/docs/AutoSaveBase.md

@@ -9,6 +9,8 @@ A component that enables autosaving of the form. It's ideal for long data entry
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+This feature requires a valid is an [Enterprise Edition](https://marmelab.com/ra-enterprise/) subscription.
+
 ## Usage
 
 Put `<AutoSaveBase>` inside a form built with ra-core [`<Form>`](https://marmelab.com/ra-core/form/):

docs_headless/src/content/docs/BulkUpdateFormBase.md

@@ -9,6 +9,8 @@ This component can be used to create forms that update multiple records at once.
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 </video>
 
+This feature requires a valid is an [Enterprise Edition](https://marmelab.com/ra-enterprise/) subscription.
+
 ## Usage
 
 Here's how one could implement a form that sets the role of multiple users:

docs_headless/src/content/docs/useAutoPersistInStore.md

@@ -16,6 +16,8 @@ The temporary form data is only saved when the user navigates away from the page
 
 Saved data is not sent to the server. It is only persisted using the [store](https://marmelab.com/ra-core/store/) and is removed when the user logs out.
 
+This feature requires a valid is an [Enterprise Edition](https://marmelab.com/ra-enterprise/) subscription.
+
 ### Usage
 
 Call `useAutoPersistInStore` inside a react-admin form:

docs_headless/src/content/docs/useAutoSave.md

@@ -4,6 +4,10 @@ title: "useAutoSave"
 
 A hook that automatically saves the form at a regular interval. It works for the `pessimistic` and `optimistic` [`mutationMode`](https://marmelab.com/ra-core/editbase/#mutationmode) but not for the `undoable`.
 
+This feature requires a valid is an [Enterprise Edition](https://marmelab.com/ra-enterprise/) subscription.
+
+## Usage
+
 Note that you **must** add the `resetOptions` prop with `{ keepDirtyValues: true }` to avoid having the user changes overridden by the latest update operation result.
 
 **Note**: `useAutoSave` is not compatible with the default `warnWhenUnsavedChanges` prop of the react-admin form components. However, it implements its own similar mechanism which is enabled by default.