Add the other maintainers globally to the CODEOWNERS file

[echoix]

Proposed Changes

1. Adds the other maintainers as code owners for the global rule, so they can also approve PRs.
2. Adds a little more explanation comments to the file.
3. Following GitHub's documentation, place the global rule above, and the exceptions below, since the last matching pattern takes precedence.

Readiness Checklist

Author/Contributor

• Add entry to the CHANGELOG listing the change and linking to the corresponding issue (if appropriate)
• If documentation is needed for this change, has that been included in this pull request

Reviewing Maintainer

• Label as breaking if this is a large fundamental change
• Label as either automation, bug, documentation, enhancement, infrastructure, or performance

[github-actions]

🦙 MegaLinter status: ❌ ERROR

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✅ REPOSITORY	secretlint	yes		no	7.92s
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✅ REPOSITORY	trivy-sbom	yes		no	1.05s
⚠️ REPOSITORY	trufflehog	yes		1	23.89s
✅ SPELL	cspell	665		0	22.9s
❌ SPELL	lychee	335		1	5.53s
✅ XML	xmllint	3	0	0	0.43s
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✅ YAML	v8r	102		0	170.39s
✅ YAML	yamllint	161		0	1.63s

See detailed report in MegaLinter reports

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[nvuillam]

Thanks @echoix :)