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/repo/settings/webhook/settings.tmpl

@@ -6,6 +6,12 @@
 */}}
 {{$isNew := not .Webhook.ID}}
 
+<div class="field">
+	<label>{{ctx.Locale.Tr "repo.settings.webhook.name"}}</label>
+	<input name="name" type="text" value="{{.Webhook.Name}}" maxlength="255">
+	<p class="help">{{ctx.Locale.Tr "repo.settings.webhook.name_helper"}}</p>
+</div>
+
 <div class="inline field">
 	<div class="ui checkbox">
 		<input name="active" type="checkbox" {{if or $isNew .Webhook.IsActive}}checked{{end}}>