Add paging headers (#36521)

Adds support for paging in admin/hooks api endpoint

fixes: https://github.com/go-gitea/gitea/issues/36516

---------

Co-authored-by: techknowlogick <techknowlogick@gitea.com>
Co-authored-by: techknowlogick <matti@mdranta.net>

routers/api/v1/user/watch.go

@@ -71,6 +71,7 @@ func GetWatchedRepos(ctx *context.APIContext) {
 		ctx.APIErrorInternal(err)
 	}
 
+	ctx.SetLinkHeader(int(total), utils.GetListOptions(ctx).PageSize)
 	ctx.SetTotalCountHeader(total)
 	ctx.JSON(http.StatusOK, &repos)
 }
@@ -99,7 +100,7 @@ func GetMyWatchedRepos(ctx *context.APIContext) {
 	if err != nil {
 		ctx.APIErrorInternal(err)
 	}
-
+	ctx.SetLinkHeader(int(total), utils.GetListOptions(ctx).PageSize)
 	ctx.SetTotalCountHeader(total)
 	ctx.JSON(http.StatusOK, &repos)
 }