Add documentation for createArtcs REST-API endpoint

Solves: Jira GER-1551
Change-Id: I46e859c923e82666bc40613574c8d1da0fc30319

src/main/resources/Documentation/rest-api-events-eiffel-artc-post.md

diff --git a/src/main/resources/Documentation/rest-api-events-eiffel-artc-post.md b/src/main/resources/Documentation/rest-api-events-eiffel-artc-post.md
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+POST createArtcs
+==============================
+
+```
+POST /projects/{project-name}/tags/{tag-name}/@PLUGIN@~createArtcs
+```
+
+DESCRIPTION
+-----------
+Creates missing
+[ArtifactCreatedEvent(ARTC)](https://github.com/eiffel-community/eiffel/blob/edition-paris/eiffel-vocabulary/EiffelArtifactCreatedEvent.md)
+,
+[CompositionDefinedEvent(CD)](https://github.com/eiffel-community/eiffel/blob/edition-paris/eiffel-vocabulary/EiffelCompositionDefinedEvent.md)
+,
+[SourceChangeSubmitted(SCS)](https://github.com/eiffel-community/eiffel/blob/edition-paris/eiffel-vocabulary/EiffelSourceChangeSubmittedEvent.md)
+and
+[SourceChangeCreated(SCC)](https://github.com/eiffel-community/eiffel/blob/edition-paris/eiffel-vocabulary/EiffelSourceChangeCreatedEvent.md)
+events for commit pointed by {tag-name}.
+
+ACCESS
+------
+[Administrate Server](../../../Documentation/access-control.html#capability_administrateServer)
+capability is required.
+
+EXAMPLES
+--------
+
+#### Create missing ARTC events for the tag stable-3.5 of project my/project: ####
+
+```
+  curl -X POST --user janeadmin:secret \
+    -H "content-type:application/json" \
+    http://host:port/a/projects/my%2Fproject/tags/stable-3.5/@PLUGIN@~createArtcs
+```
+
+__Response:__
+
+```
+  )]}'
+  {
+   "types": [
+     "EiffelArtifactCreatedEvent",
+     "EiffelCompositionDefinedEvent",
+     "EiffelSourceChangeCreatedEvent",
+     "EiffelSourceChangeSubmittedEvent",
+   ],
+   "repo_name": "my/project",
+   "ref": "refs/tags/stable-3.5",
+   "status": "Event creation scheduled",
+  }
+```
+
+### Response object ###
+types
+: The types of events that may be created.
+
+repo_name
+: Name of the repository.
+
+ref
+: The ref of the tag from which we will create an ARTC event.
+
+SEE ALSO
+--------
+* [Plugin Development](../../../Documentation/dev-plugins.html)
+* [REST API Protocol Details](../../../Documentation/rest-api.html#_protocol_details)
+
+GERRIT
+------
+Part of [Gerrit Code Review](../../../Documentation/index.html)