Add bulk repository deletion for organizations (#36763)

Fixes #36512

This PR adds a new API endpoint to delete all repositories within an
organization in a single operation, improving efficiency for
organization cleanup and management tasks.

---------

Signed-off-by: Karthik Bhandary <34509856+karthikbhandary2@users.noreply.github.com>
Co-authored-by: karthik.bhandary <karthik.bhandary@kfintech.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/swagger/v1_json.tmpl

@@ -3633,6 +3633,39 @@
             "$ref": "#/responses/notFound"
           }
         }
+      },
+      "delete": {
+        "produces": [
+          "application/json"
+        ],
+        "tags": [
+          "organization"
+        ],
+        "summary": "Delete all repositories in an organization",
+        "operationId": "orgDeleteRepos",
+        "parameters": [
+          {
+            "type": "string",
+            "description": "name of the organization",
+            "name": "org",
+            "in": "path",
+            "required": true
+          }
+        ],
+        "responses": {
+          "202": {
+            "$ref": "#/responses/empty"
+          },
+          "204": {
+            "$ref": "#/responses/empty"
+          },
+          "403": {
+            "$ref": "#/responses/forbidden"
+          },
+          "404": {
+            "$ref": "#/responses/notFound"
+          }
+        }
       }
     },
     "/orgs/{org}/teams": {