add acymailing action

src/essentials-for-yootheme-pro/addons/forms/_partials/action-acymailing.md

@@ -0,0 +1,30 @@
+## AcyMailing Action {#acymailing}
+
+<div class="tm-resource-icon">
+    <!--@include: ../assets/action-acymailing.svg-->
+</div>
+
+The **AcyMailing Action** subscribes or unsubscribes a member from an [AcyMailing](https://www.acymailing.com/) list.
+
+### Subscribe {#acymailing-subscribe}
+
+Create or update an AcyMailing list subscriber.
+
+| Setting | Description | Required | Dynamic |
+| --- | --- | :---: | :---: |
+| *Email* | Subscriber's email address. | &#x2713; | &#x2713; |
+| *Name* | Subscriber's name, it will be autocreated from the email if omited. | | &#x2713; |
+| *Status* | Subscriber's confirmation status. | | &#x2713; |
+| *Lists* | The lists to which to subscribe. | &#x2713; | &#x2713; |
+| *Custom Fields* | Subscriber's additional data specified by AcyMailing custom fields. | &#x2713; | &#x2713; |
+<!--@include: ./common-action-settings.md-->
+
+### Unsubscribe {#acymailing-unsubscribe}
+
+Unsubcribe an AcyMailing list subscriber.
+
+| Setting | Description | Required | Dynamic |
+| --- | --- | :---: | :---: |
+| *Email* | Subscriber's email address. | &#x2713; | &#x2713; |
+| *Lists* | The lists to which to subscribe. | &#x2713; | &#x2713; |
+<!--@include: ./common-action-settings.md-->

src/essentials-for-yootheme-pro/addons/forms/actions.md

@@ -2,6 +2,7 @@
 
 Actions are multi-instance functions that will run sequentially, after a form has been successfully submitted. To learn more about [actions](./form-area#after-submit-actions), see the corresponding documentation.
 
+<!--@include: ./_partials/action-acymailing.md-->
 <!--@include: ./_partials/action-airtable.md-->
 <!--@include: ./_partials/action-alter.md-->
 <!--@include: ./_partials/action-download.md-->