Module development and code questions

hello I have a page not found error this is my codes : 

1. routing 

booking.booking_form:

path: '/booking/{id}'

defaults:

_form: '\Drupal\booking\Form\BookingForm'

_title: 'booking'

requirements:

_permission: 'access content'

booking.liste:

path: '/booking/list'

defaults:

_controller: '\Drupal\booking\Controller\ListeController::getliste'

_title: 'Liste'

requirements:

_permission: 'access content'

2. module 

<?php

Hi,

Embarking on your first module is a frustrating affair!! Am I right?

So, here's what iv'e got so far:

-----------form types stuff up here, all working nicely ---------

Hello

I would like to add a form to a page view, 

--------myphp_ludo_form declared up here----------

  function myphp_ludo_node_view($node, $view_mode, $langcode) {

    if($view_mode == 'full' && $node->type == 'page') {

        echo 'This is a page';

        $form = drupal_get_form('myphp_ludo_form');

      }

    }

In the node view i see the echo but no form element, any ideas guys?

I am creating a install profile which is supposed to install a custom module(numscroller) while custom profile is being installed.

The location of the module is mysite/profiles/innovation/modules/numscroller

But when I run the installer with 'innovation' profile selected then i get 

Required modules not found.

The following modules are required but were not found. Move them into the appropriate modules subdirectory, such as /modules. Missing modules: 

I've got a Drupal 8 application where, under certain conditions, while building a form (in buildForm), I need to redirect instead of continuing to build the form.  What's the best way to do this?