feat(api): return run_number in workflow dispatch (#7286)

- This is a follow up on #7193 and resolves #6312.
- The ID by itself is not very useful, so also return the index of the workflow run.

Co-authored-by: Klaus Fyhn <klausfyhn@gmail.com>
Co-authored-by: Klaus Fyhn <klfj@mir-robots.com>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7286
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: klausfyhn <klausfyhn@noreply.codeberg.org>
Co-committed-by: klausfyhn <klausfyhn@noreply.codeberg.org>

templates/swagger/v1_json.tmpl

@@ -5414,6 +5414,9 @@
           }
         ],
         "responses": {
+          "201": {
+            "$ref": "#/responses/DispatchWorkflowRun"
+          },
           "204": {
             "$ref": "#/responses/empty"
           },
@@ -23193,6 +23196,12 @@
             "type": "string"
           },
           "x-go-name": "Jobs"
+        },
+        "run_number": {
+          "description": "a unique number for each run of a repository",
+          "type": "integer",
+          "format": "int64",
+          "x-go-name": "RunNumber"
         }
       },
       "x-go-package": "code.gitea.io/gitea/modules/structs"