feat: add support for Lifecycles in BOM metadata

[Churro]

part of #578

[jkowalleck]

The implementation is really well thought and has almost every small detail perfectly correct. 🥇

There are just a very small amount of things that needs changing, marked with ❌ .

In addition, please add the needed enum tests to tests/test_enums.py.

[Churro]

I tried to align the class names as closely as possible with the CDX 1.5 specification to avoid potentially confusing homonyms.

I've also seen that cyclonedx-javascript-library uses LifecyclePhase, NamedLifecycle and cyclone-core-java uses LifecycleChoice. Related to these, would the following naming suggestion be ok for you?

• Phase -> LifecyclePhase
• CustomPhase -> NamedLifecycle
• PredefinedPhase -> PredefinedLifecycle

[jkowalleck]

I tried to align the class names as closely as possible with the CDX 1.5 specification to avoid potentially confusing homonyms.

I've also seen that cyclonedx-javascript-library uses LifecyclePhase, NamedLifecycle and cyclone-core-java uses LifecycleChoice. Related to these, would the following naming suggestion be ok for you?

* `Phase` -> `LifecyclePhase`

* `CustomPhase` -> `NamedLifecycle`

* `PredefinedPhase` -> `PredefinedLifecycle`

The renaming you proposed sounds reasonable. Please continue with that.

[jkowalleck]

@Churro,

I've proposed some changes on top of yours: Churro#1
If you would simply merge my pull request, your pullrequest would update automatically.

PS: was done via df0fdf0

[jkowalleck]

@madpah could you review the current state of this PR? It aims to cover $.metadata.lifecycles from #578

[jkowalleck]

@Churro,
Could you rebase onto the latest main branch and fix the conflicts accordingly?

[jkowalleck]

some of the tests are failing.

@Churro , you may run them locally as described in https://github.com/CycloneDX/cyclonedx-python-lib/blob/main/CONTRIBUTING.md

PS: done so via bc74a86

[jkowalleck]

thank you for contributing this feature, @Churro .

it was released via v8.1.0 🎉