Wiki updates

[PaulBouchier]

Hi Thomas - thank you for all the work you have put into the wiki - it is very helpful. I noticed several sections of the wiki need to be updated as listed below.

1. Laser filter. I saw you reverted the code change that set a box filter for laser data, but I don't think you reverted the corresponding section of the wiki - it still describes the box filter here: https://github.com/hippo5329/linorobot2_hardware/wiki#laser-filter
2. Incorrect path in section "Configure URDF in Linorobot2" at https://github.com/hippo5329/linorobot2_hardware/wiki#configure-urdf-in-linorobot2 - the text says to change for example the file 2wd.xxxxx.xacro at a path that begins with ros2_ws/src/linorobot2. The path should begin with linorobot2_ws/src/linorobot2
3. Bad instruction in section https://github.com/hippo5329/linorobot2_hardware/wiki#nav2-custom-nav2_params-file - the instruction tells the reader to copy a navigation.yaml file from a repo that is actually for a robot called sam_bot, and it doesn't work in linorobot because it prefixes topic names with /demo. E.g. odometry is on topic /demo/odom. That sam_bot config file is not the default that nav2 on Jazzy uses. See the PR I submitted in linorobot2 to update navigation.yaml. A correct instruction would be to modify the navigation.yaml that is the default for nav2 on Jazzy, which is what should end up in linorobot2_navigation/config
4. Poor wording in first sentence of section https://github.com/hippo5329/linorobot2_hardware/wiki#nav2-slam - it starts out saying "Follow the nav2_slam_tutoioal" (Note the typo in tutoial, missing 'r' between 'o' and 'i'. But actually the reader shouldn't follow that tutorial, they should reference it for additional information, and the steps that follow get the user to do on their linorobot what the nav2_tutorial does on Turtlebot3. Better wording might be, "Use SLAM to create and save a map. Reference the for additonal information about the following steps."
5. Poor wording in first sentence of section https://github.com/hippo5329/linorobot2_hardware/wiki#nav2-slam - same problem as above - it starts out saying, "Follow the nav2 navigation tutorial" but actually the reader shouldn't follow that tutorial - they should reference it for additonal information. Better wording might be, "Navigate within the map you just created. Reference the for additional information about the following steps.
6. I'm actually undecided if the previous two steps (using the nav2 launch files to run the reader's linorobot) are a good idea. They gave me confidence because they use nav2 scripts and launch files, but they aren't the real linorobot scripts and launch files, which are used in the next two sections.

More later. Thanks again for all your good work, which I find very helpful.

[hippo5329]

@PaulBouchier Thank you so much for your helps. I would like to invite you to be collaborator of these projects, linorobot2_hardware and linorobot2. You may update the repos and wiki. Git rebase is preferred than merge.

This the first time I added collaborator. Please let me know if it does not work.

[PaulBouchier]

Thanks for the commit privilege on your repos. I will be very careful.

I have merge-rebased the navigation.yaml update. Have a look at the wiki updates I made and see if you like them.

[hippo5329]

@PaulBouchier Thanks a lot for your contribution.

[PaulBouchier]

Closing - all issues addressed.