chore(release): release v1.0.0-rc3

[acgetchell]

Finalize synchronized release metadata and the release date for v1.0.0-rc3. No feature work.

Summary by CodeRabbit

• Release

  • Updated the project to release candidate v1.0.0-rc3.
  • Synchronized version information across package metadata, documentation, citations, build outputs, and distribution manifests.
  • Updated changelog and added comparison references for the new release candidate.

• Documentation

  • Updated maintenance status, setup/validation targets, and citation guidance to reference v1.0.0-rc3.
  • Refreshed release instructions to use v1.0.0-rc3, including syncing release artifacts.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 93032209-1cce-44ee-bb71-9dd9dfc48919

📥 Commits

Reviewing files that changed from the base of the PR and between 990a1a2 and e8f45ea.

📒 Files selected for processing (2)

• CHANGELOG.md
• CITATION.cff

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Walkthrough

CDT++ release metadata was advanced from 1.0.0-rc2 to 1.0.0-rc3 across build, packaging, citation, documentation, release instructions, README references, and changelog history.

Changes

Release candidate rc3

Layer / File(s)	Summary
Release metadata and package versions CMakeLists.txt, CITATION.cff, pyproject.toml, vcpkg.json, docs/Doxyfile	Build, citation, Python package, vcpkg, and Doxygen version metadata now identify rc3.
Release process and declared-version references docs/RELEASING.md, .github/CONTRIBUTING.md, README.md, REFERENCES.md	Release instructions and repository references now use rc3, including synchronized release-artifact guidance.
Release history and comparison links CHANGELOG.md	Added the dated rc3 changelog entry and comparison references for rc1, rc2, and rc3.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• acgetchell/CDT-plusplus#119: Updates the same CDT++ release-candidate metadata and documentation flow for the preceding release candidate.

Poem

RC two fades, RC three takes flight,
Build files glow with version light.
Docs and citations march in line,
Changelog stars begin to shine.
A release tag waits, crisp and fine.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the v1.0.0-rc3 release metadata update.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/v1.0.0-rc3

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