Add webhook name field to improve webhook identification (#37025) (#37040)

Add an optional Name field to webhooks so users can give them
human-readable labels instead of relying only on URLs. The webhook
overview page now displays names when available, or falls back to the
URL for unnamed webhooks.

Fixes #37025

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/swagger/v1_json.tmpl

@@ -23463,6 +23463,11 @@
           },
           "x-go-name": "Events"
         },
+        "name": {
+          "description": "Optional human-readable name for the webhook",
+          "type": "string",
+          "x-go-name": "Name"
+        },
         "type": {
           "type": "string",
           "enum": [
@@ -24729,6 +24734,11 @@
             "type": "string"
           },
           "x-go-name": "Events"
+        },
+        "name": {
+          "description": "Optional human-readable name",
+          "type": "string",
+          "x-go-name": "Name"
         }
       },
       "x-go-package": "code.gitea.io/gitea/modules/structs"
@@ -26149,6 +26159,11 @@
           "format": "int64",
           "x-go-name": "ID"
         },
+        "name": {
+          "description": "Optional human-readable name for the webhook",
+          "type": "string",
+          "x-go-name": "Name"
+        },
         "type": {
           "description": "The type of the webhook (e.g., gitea, slack, discord)",
           "type": "string",