docs: add common/admin/manager to API docs

These APIs already existed, and were considered stable in cephfs/admin
before getting moved. I initially was going to mark them preview but then
realized that cephfs/admin depends on them and having them marked
preview with the ceph_preview tag would break cephfs/admin. Due to the
above, I think an exception to the policy is warranted here as there
is not much new except the package itself.

Signed-off-by: John Mulligan <jmulligan@redhat.com>

docs/api-status.json

@@ -1740,5 +1740,32 @@
         "comment": "RemoveUserCap removes the capabilities from a user.\nOn Success, it returns the updated list of UserCaps for the user.\n"
       }
     ]
+  },
+  "common/admin/manager": {
+    "name": "common/admin/manager",
+    "summary": {
+      "total": 0,
+      "found": 0,
+      "missing": 0,
+      "deprecated": 0
+    },
+    "stable_api": [
+      {
+        "name": "NewFromConn",
+        "comment": "NewFromConn creates an new management object from a preexisting\nrados connection. The existing connection can be rados.Conn or any\ntype implementing the RadosCommander interface.\n"
+      },
+      {
+        "name": "MgrAdmin.EnableModule",
+        "comment": "EnableModule will enable the specified manager module.\n\nSimilar To:\n ceph mgr module enable <module> [--force]\n"
+      },
+      {
+        "name": "MgrAdmin.DisableModule",
+        "comment": "DisableModule will disable the specified manager module.\n\nSimilar To:\n ceph mgr module disable <module>\n"
+      },
+      {
+        "name": "MgrAdmin.ListModules",
+        "comment": "ListModules returns a module info struct reporting the lists of\nenabled, disabled, and always-on modules in the Ceph mgr.\n"
+      }
+    ]
   }
-}
+}

docs/api-status.md

@@ -37,3 +37,5 @@ Snapshot.Set | v0.10.0 |  |
 Name | Added in Version | Expected Stable Version | 
 ---- | ---------------- | ----------------------- | 
 
+## Package: common/admin/manager
+