feat(poetry plugin): add support for upcoming Poetry PEP 621 projects

[DavidVujic]

Description

Adding support for the upcoming Poetry release, that will be PEP 621 compliant, and for those Poetry projects using the PEP 621 standard to define project metadata and dependencies.

Motivation and Context

To fully support Poetry, both as-is today and the future PEP 621 release.

How Has This Been Tested?

✅ CI
✅ Unit tests
✅ Local install of the Poetry tool, running all commands.
✅ Local install of the CLI into a uv project, running all commands.

Types of changes

• 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)

Checklist:

• I have read the code of conduct.
• I have read the contributing guide.
• I have updated the documentation accordingly (if applicable).

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud