action: confirm accompanying period + create workflow

src/Bundle/ChillPersonBundle/chill.api.specs.yaml

@@ -677,3 +677,27 @@ paths:
           description: "OK"
         422:
           description: "object with validation errors"
+
+  /1.0/person/accompanying-course/{id}/confirm.json:
+    post:
+      tags:
+        - person
+      summary: confirm an accompanying course
+      parameters:
+        - name: id
+          in: path
+          required: true
+          description: The accompanying period's id
+          schema:
+            type: integer
+            format: integer
+            minimum: 1
+      responses:
+        401:
+          description: "Unauthorized"
+        404:
+          description: "Not found"
+        200:
+          description: "OK"
+        400:
+          description: "transition cannot be applyed"