Added pure_pursuit, pure_pursuit_visualiser, head_to_goal, localization launch files

[winola-whu]

Description

Issue #

created launch folders in the relevant packages and launch files in those launch folders

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[Tanish29]

looks good to me, just check the launch files run without any errors

[Zane-Larking]

Could you have the pure_pursuit_visualizer functionality incorporated in to the pure pursuit node.
Then parameterise publishing the visualizer topics based a 'vis' parameter.

[winola-whu]

Request of changes completed, all launch files are tested too, pls review again it should be ready to merge

[Zane-Larking]

Looks good for now.
In future the controllers launch file should be combined. However, it's best to recombine back to nightly first to take stock of everyone'ss changes.