[DOCS] Get case status API (#128802)

docs/api/cases.asciidoc

@@ -14,10 +14,10 @@ these APIs:
 * <<cases-api-find-connectors>>
 * {security-guide}/cases-api-get-case-activity.html[Get all case activity]
 * <<cases-api-get-case>>
+* <<cases-api-get-status>>
 * <<cases-api-get-comments>>
 * {security-guide}/cases-get-connector.html[Get current connector]
 * {security-guide}/cases-api-get-reporters.html[Get reporters]
-* {security-guide}/cases-api-get-status.html[Get status]
 * {security-guide}/cases-api-get-tag.html[Get tags]
 * {security-guide}/cases-api-push.html[Push case]
 * {security-guide}/assign-connector.html[Set default Elastic Security UI connector]
@@ -37,6 +37,7 @@ include::cases/cases-api-find-cases.asciidoc[leveloffset=+1]
 include::cases/cases-api-find-connectors.asciidoc[leveloffset=+1]
 //GET
 include::cases/cases-api-get-case.asciidoc[leveloffset=+1]
+include::cases/cases-api-get-status.asciidoc[leveloffset=+1]
 include::cases/cases-api-get-comments.asciidoc[leveloffset=+1]
 //UPDATE
 include::cases/cases-api-update.asciidoc[leveloffset=+1]

docs/api/cases/cases-api-get-status.asciidoc

@@ -0,0 +1,60 @@
+[[cases-api-get-status]]
+== Get case status API
+++++
+<titleabbrev>Get case status</titleabbrev>
+++++
+
+Returns the number of cases that are open, closed, and in progress.
+
+deprecated::[8.1.0]
+
+=== Request
+
+`GET <kibana host>:<port>/api/cases/status`
+
+`GET <kibana host>:<port>/s/<space_id>/api/cases/status`
+
+=== Prerequisite
+
+You must have `read` privileges for the *Cases* feature in the *Management*,
+*{observability}*, or *Security* section of the
+<<kibana-feature-privileges,{kib} feature privileges>>, depending on the
+`owner` of the cases you're seeking.
+
+=== Path parameters
+
+<space_id>::
+(Optional, string) An identifier for the space. If it is not specified, the
+default space is used.
+
+=== Query parameters
+
+`owner`::
+(Optional, string or array of strings) A filter to limit the retrieved case
+statistics to a specific set of applications. Valid values are: `cases`,
+`observability`, and `securitySolution`. If this parameter is omitted, the
+response contains all cases that the user has access to read.
+
+=== Response code
+
+`200`::
+   Indicates a successful call.
+
+=== Example
+
+[source,sh]
+--------------------------------------------------
+GET api/cases/status
+--------------------------------------------------
+// KIBANA
+
+The API returns the following type of information:
+
+[source,json]
+--------------------------------------------------
+{
+  "count_open_cases": 27,
+  "count_in_progress_cases": 50,
+  "count_closed_cases": 1198,
+}
+--------------------------------------------------