ci: add update-codeownders-from-packages.yaml

[kenji-miyake]

Description

To automatically set reviewers and to ensure reviews by code owners, I'd like to introduce CODEOWNERS.
https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners

As it's troublesome to manually maintain CODEOWNERS for each package, I propose a way to generate it from maintainers in package.xml.

We have to update maintainers before merging this.
Related: #1610

Also, I'm planning to implement this in autoware-github-actions and use it in common for all repositories.

Pre-review checklist for the PR author

The PR author must check the checkboxes below when creating the PR.

• I've confirmed the contribution guidelines.
• The PR follows the pull request guidelines.

In-review checklist for the PR reviewers

The PR reviewers must check the checkboxes below before approval.

• The PR follows the pull request guidelines.

Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.

After all checkboxes are checked, anyone who has write access can merge the PR.

[kenji-miyake]

FYI @xmfcx The test results of CODEOWNERS by TIER IV:

.
├── README.md # no owner
├── full-time
│   └── README.md
├── miyake
│   └── README.md
├── saito
│   └── README.md
└── taka
    └── README.md

full-time/* @tier4/full-time-employee
miyake/* kenji.miyake@tier4.jp
saito/* @yukkysaito
taka/* @TakaHoribe

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[xmfcx]

So does this give people write permissions to edit the folders they are in?

Example:

planning/behavior_path_planner takamasa.horibe@tier4.jp this is a line from the CODEOWNERS file.

Assume takamasa.horibe@tier4.jp github account isn't in any of the github teams. And not registered in our repository.

Does he gain write access to that package if he is on the CODEOWNERS list?

Edit:

Oh if he doesn't already have write access, it doesn't change anything.

[kenji-miyake]

@xmfcx No, if the people listed CODEOWNERs don't have write permissions, I believe GitHub reports errors.

[kenji-miyake]

@xmfcx @BonoloAWF By the way, does AWF have a common email like opensource@apex.ai?

[kenji-miyake]

Worked: #1671

Since this PR itself won't update CODEOWNERS (#1671 will do), I want to merge this.