Mention relations management in Entity Service and Query Engine APIs

Author: pwizla

docs/developer-docs/latest/developer-resources/database-apis-reference/entity-service/crud.md

@@ -85,6 +85,8 @@ Syntax: `create(uid: string, parameters: Params)` ⇒ `Entry`
 | `populate` | Relations, components and dynamic zones to [populate](/developer-docs/latest/developer-resources/database-apis-reference/entity-service/populate.md) | [`PopulateParameter`<Fa-Link color="grey"/>](/developer-docs/latest/developer-resources/database-apis-reference/entity-service/populate.md) |
 | `data`     | Input data                                                                                                                                             | `Object`                                                                                                                                      |
 
+!!!include(developer-docs/latest/developer-resources/database-apis-reference/snippets/managing-relations.md)!!!
+
 ### Example
 
 ```js
@@ -105,6 +107,8 @@ Updates one entry and returns it.
 
 Syntax: `update(uid: string, id: ID, parameters: Params)` ⇒ `Entry`
 
+!!!include(developer-docs/latest/developer-resources/database-apis-reference/snippets/managing-relations.md)!!!
+
 ### Parameters
 
 | Parameter  | Description                                                                                                                                            | Type                                                                                                                                          |

docs/developer-docs/latest/developer-resources/database-apis-reference/query-engine/single-operations.md

@@ -113,6 +113,8 @@ const entry = await strapi.db.query('api::blog.article').create({
 });
 ```
 
+!!!include(developer-docs/latest/developer-resources/database-apis-reference/snippets/managing-relations.md)!!!
+
 ## update()
 
 Updates one entry and returns it.
@@ -139,6 +141,8 @@ const entry = await strapi.db.query('api::blog.article').update({
 });
 ```
 
+!!!include(developer-docs/latest/developer-resources/database-apis-reference/snippets/managing-relations.md)!!!
+
 ## delete()
 
 Deletes one entry and returns it.

docs/developer-docs/latest/developer-resources/database-apis-reference/snippets/managing-relations.md

@@ -0,0 +1,3 @@
+:::tip
+In the `data` object, relations can be managed with the `connect`, `disconnect`, and `set` parameters using the syntax described for the REST API (see [managing relations](/developer-docs/latest/developer-resources/database-apis-reference/rest/relations.md)).
+:::