Update release metadata for v0.10.0

[robzolkos]

Summary

• set the Nix package version to 0.10.0
• set the Claude and Codex plugin versions to 0.10.0

Validation

• make release-check
• make test-release
• Nix build verification from scripts/update-nix-flake.sh

This release-prep PR is required because main accepts changes through pull requests.

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Summary by cubic

Prepares the v0.10.0 release by bumping the Nix package and the Claude and Codex plugin versions from 0.9.1 to 0.10.0.

^{Written for commit 22e617c. Summary will update on new commits.}

[Copilot]

🟢 Approval recommended

All reviewed release metadata updates are consistent, with no unresolved issues.

Pull request overview

Updates release metadata from 0.9.1 to 0.10.0 across the Nix package and agent plugins.

Changes:

• Bumps the Nix package version.
• Synchronizes the Claude and Codex plugin versions.

File summaries

File	Description
nix/package.nix	Sets the Nix package version to 0.10.0.
.codex-plugin/plugin.json	Sets the Codex plugin version to 0.10.0.
.claude-plugin/plugin.json	Sets the Claude plugin version to 0.10.0.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0
• Review effort level: Balanced

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