Update maintainers and add url tags (backport #1363)

[mergify]

The contents of the package.xml get parsed for index.ros.org, so I thought it might be worth updating them.

• Update the current maintainers
• Where possible, I added the original authors as <author>
• add url tags, but only to github and control.ros.org homepage. The direct links to the controllers have the ROS distro in the URL, that would soon become outdated.

  ---

  This is an automatic backport of pull request Update maintainers and add url tags #1363 done by Mergify.

[mergify]

Cherry-pick of de77fd0 has failed:

On branch mergify/bp/iron/pr-1363
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Changes to be committed:
	modified:   ackermann_steering_controller/package.xml
	modified:   admittance_controller/package.xml
	modified:   bicycle_steering_controller/package.xml
	modified:   effort_controllers/package.xml
	modified:   force_torque_sensor_broadcaster/package.xml
	modified:   forward_command_controller/package.xml
	modified:   gripper_controllers/package.xml
	modified:   imu_sensor_broadcaster/package.xml
	modified:   joint_state_broadcaster/package.xml
	modified:   joint_trajectory_controller/package.xml
	modified:   pid_controller/package.xml
	modified:   position_controllers/package.xml
	modified:   ros2_controllers_test_nodes/package.xml
	modified:   rqt_joint_trajectory_controller/package.xml
	modified:   steering_controllers_library/package.xml
	modified:   tricycle_controller/package.xml
	modified:   tricycle_steering_controller/package.xml
	modified:   velocity_controllers/package.xml

Unmerged paths:
  (use "git add/rm <file>..." as appropriate to mark resolution)
	both modified:   diff_drive_controller/package.xml
	deleted by us:   parallel_gripper_controller/package.xml
	both modified:   pose_broadcaster/package.xml
	both modified:   range_sensor_broadcaster/package.xml
	both modified:   ros2_controllers/package.xml

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.93%. Comparing base (af1a840) to head (d3da765).
Report is 2 commits behind head on iron.

Additional details and impacted files

@@           Coverage Diff           @@
##             iron    #1365   +/-   ##
=======================================
  Coverage   64.92%   64.93%           
=======================================
  Files         107      107           
  Lines       12283    12283           
  Branches     7577     7577           
=======================================
+ Hits         7975     7976    +1     
  Misses       1540     1540           
+ Partials     2768     2767    -1     

Flag	Coverage Δ
unittests	64.93% <ø> (+<0.01%)	⬆️

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see 1 file with indirect coverage changes