Add user webhooks (#21563)

Currently we can add webhooks for organizations but not for users. This
PR adds the latter. You can access it from the current users settings.


![grafik](https://user-images.githubusercontent.com/1666336/197391408-15dfdc23-b476-4d0c-82f7-9bc9b065988f.png)

routers/web/user/setting/webhooks.go

@@ -0,0 +1,48 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package setting
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/models/webhook"
+	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/setting"
+)
+
+const (
+	tplSettingsHooks base.TplName = "user/settings/hooks"
+)
+
+// Webhooks render webhook list page
+func Webhooks(ctx *context.Context) {
+	ctx.Data["Title"] = ctx.Tr("settings")
+	ctx.Data["PageIsSettingsHooks"] = true
+	ctx.Data["BaseLink"] = setting.AppSubURL + "/user/settings/hooks"
+	ctx.Data["BaseLinkNew"] = setting.AppSubURL + "/user/settings/hooks"
+	ctx.Data["Description"] = ctx.Tr("settings.hooks.desc")
+
+	ws, err := webhook.ListWebhooksByOpts(ctx, &webhook.ListWebhookOptions{OwnerID: ctx.Doer.ID})
+	if err != nil {
+		ctx.ServerError("ListWebhooksByOpts", err)
+		return
+	}
+
+	ctx.Data["Webhooks"] = ws
+	ctx.HTML(http.StatusOK, tplSettingsHooks)
+}
+
+// DeleteWebhook response for delete webhook
+func DeleteWebhook(ctx *context.Context) {
+	if err := webhook.DeleteWebhookByOwnerID(ctx.Doer.ID, ctx.FormInt64("id")); err != nil {
+		ctx.Flash.Error("DeleteWebhookByOwnerID: " + err.Error())
+	} else {
+		ctx.Flash.Success(ctx.Tr("repo.settings.webhook_deletion_success"))
+	}
+
+	ctx.JSON(http.StatusOK, map[string]interface{}{
+		"redirect": setting.AppSubURL + "/user/settings/hooks",
+	})
+}