Docs: Clarify Epic, Project, and Workflows in Documentation/Contributions

[camilamacedo86]

User story

As a contributor or maintainer of the operator-framework/operator-controller project,
I want clear documentation about epics, projects, and workflows,
so that I can better understand the project structure, align my contributions with priorities, and effectively participate in the development lifecycle.

List if issues

• Ensure that we have the information tracked in the Contributing docs

New content or update?

Update existing content

Types of documentation

Reference

References

No response

[github-actions]

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