[EPIC] Consolidate all maintainer process docs in new "Maintainer Docs" page

[jrhemstad]

Is this a duplicate?

• I confirmed there appear to be no duplicate issues for this bug and that I agree to the Code of Conduct

Is this for new documentation, or an update to existing docs?

New

Describe the incorrect/future/missing documentation

Summary

CCCL maintainer process/policy documentation is currently fragmented across:

• rendered docs (docs/*.rst)
• top-level markdown docs (CONTRIBUTING.md, ci-overview.md, AGENTS.md, etc.)
• workflow/config files (.github/workflows/*.yml, issue/PR templates)
• GitHub wiki process pages

This issue tracks consolidation into a single canonical Maintainer Docs section under docs/maintainers/, with clear contributor-vs-maintainer boundaries and de-duplication of stale content.

Why

• Reduce duplicated/outdated process guidance
• Make maintainer workflows discoverable and reviewable
• Keep executable workflow truth in YAML/scripts, but make human policy truth live in docs

References

• RAPIDS Maintainer Docs: https://docs.rapids.ai/maintainers/
• RAPIDS Contributing docs: https://docs.rapids.ai/contributing/
• CCCL Wiki home/process docs: https://github.com/NVIDIA/cccl/wiki

Goals

• Establish docs/maintainers/* as the canonical maintainer process docs.
• Migrate relevant content from docs/wiki/markdown/workflow comments.
• Add links from old locations to canonical pages.
• Deprecate or archive stale duplicate pages.

Proposed Maintainer Docs

• Branching Strategy
• Backport Process
• Release Management
• Triage and Issue Lifecycle
• PR and Code Review
• Project Board Usage
• CI
• Build/Test
• Policy and Governance References

Source Inventory

Existing docs pages

• docs/cccl/development/index.rst
• docs/cccl/development/build_and_bisect_tools.rst
• docs/cccl/contributing.rst
• docs/thrust/release_process.rst
• docs/thrust/releases.rst / docs/cub/releases.rst / docs/libcudacxx/releases.rst

Top-level/process markdown

• CONTRIBUTING.md
• ci-overview.md
• .devcontainer/README.md
• CODE_OF_CONDUCT.md, SECURITY.md

Workflow/config-embedded policy

• Release workflows + docs:
  • .github/workflows/release-README.md
  • .github/workflows/release-create-new.yml
  • .github/workflows/release-update-rc.yml
  • .github/workflows/release-finalize.yml
  • .github/workflows/release-wheels.yml
  • .github/workflows/update-branch-version.yml
  • .github/release.yml
• Backporting:
  • .github/workflows/backport-prs.yml
• Triage/project automation:
  • .github/workflows/triage_rotation.yml
  • .github/workflows/project_automation_*.yml
• Contribution interfaces:
  • .github/PULL_REQUEST_TEMPLATE.md
  • .github/ISSUE_TEMPLATE/*.yml
  • .github/copy-pr-bot.yaml

Wiki pages to migrate

• Home / Principles for Open Development
• Triage
• Issue and PR Hygiene
• Issue Types
• Project Usage
• Sprint Planning
• Roadmapping/Release Planning
• Code Review

If this is a correction, please provide a link to the incorrect documentation. If this is a new documentation request, please link to where you have looked.

No response