[GH-26715] Added Pagination Support for IncomingWebHooks (#27502)

* Added Pagination Support for IncomingWebHooks

* Incorporated feedback from reviews

* Removed trailing spaces

* Restored deleted server en.json entries, fixed order in webapp en.json

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/api4/webhook.go

@@ -184,6 +184,8 @@ func getIncomingHooks(c *Context, w http.ResponseWriter, r *http.Request) {
 
 		hooks  []*model.IncomingWebhook
 		appErr *model.AppError
+		js     []byte
+		err    error
 	)
 
 	if teamID != "" {
@@ -217,7 +219,20 @@ func getIncomingHooks(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	js, err := json.Marshal(hooks)
+	if c.Params.IncludeTotalCount {
+		totalCount, appErr := c.App.GetIncomingWebhooksCount(teamID, userID)
+
+		if appErr != nil {
+			c.Err = appErr
+			return
+		}
+
+		hooksWithCount := model.IncomingWebhooksWithCount{Webhooks: hooks, TotalCount: totalCount}
+		js, err = json.Marshal(hooksWithCount)
+	} else {
+		js, err = json.Marshal(hooks)
+	}
+
 	if err != nil {
 		c.Err = model.NewAppError("getIncomingHooks", "api.marshal_error", nil, "", http.StatusInternalServerError).Wrap(err)
 		return