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

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

services/forms/repo_form.go

@@ -206,6 +206,7 @@ type ProtectBranchPriorityForm struct {
 
 // WebhookForm form for changing web hook
 type WebhookForm struct {
+	Name                     string `binding:"MaxSize(255)"`
 	Events                   string
 	Create                   bool
 	Delete                   bool