* Move dwb goal/progress checker plugins to nav2_controller

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Move goal/progress checker plugins to nav2_controller

Address review comments

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Move goal/progress checker plugins to nav2_controller

Use new plugin declaration format and doc update

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Update bringup.yaml for new plugins in nav2_controller

Also remove redundent file from dwb_plugins
Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Fix doc errors and update remaining yaml files

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Remove mention of goal_checker from dwb docs

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Add .plugin params to doc

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Tests for progress_checker plugin

declare .plugin only if not declared before

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>

* Tweak plugin names/description in doc

Signed-off-by: Siddarth Gore <siddarth.gore@gmail.com>