chore: remove Docker/GHCR build workflow

[elkaix]

Deletes .github/workflows/docker.yml entirely. No more amd64/arm64 image builds or pushes to ghcr.io/pythoughts-labs/pythinker-code on release tags.

Summary by CodeRabbit

• Chores
  • Removed Docker container image build and deployment automation workflow that previously handled multi-architecture image builds and registry publishing.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

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📥 Commits

Reviewing files that changed from the base of the PR and between 95bbd99 and f030f13.

📒 Files selected for processing (1)

• .github/workflows/docker.yml

💤 Files with no reviewable changes (1)

• .github/workflows/docker.yml

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📝 Walkthrough

Walkthrough

Deletion of .github/workflows/docker.yml removes the complete Docker build and release workflow. The workflow previously handled multi-architecture container builds, digest-based image publication to GHCR, manifest merging, and conditional :latest tag promotion based on release prerelease status.

Changes

Cohort / File(s)	Summary
Workflow configuration .github/workflows/docker.yml	Complete workflow removal (308 lines deleted). Eliminates release-tag inputs, version resolution, PyPI wheel gate, amd64/arm64 image builds, digest artifact merging into multi-arch manifests, and conditional :latest promotion logic tied to prerelease status.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is minimal but clearly states what was deleted and its impact; however, it lacks the required template sections including Related Issue, checklist items, and details about testing/documentation updates.	Add the required template sections: link the related issue, confirm CONTRIBUTING.md review, and verify checklist items (tests, changelog, docs) are completed or explain why they don't apply.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title follows conventional commits format (chore type) and accurately describes the main change: removal of the Docker/GHCR build workflow.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/remove-docker-workflow

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