Rename organization from jsr-probitas to probitas-test

[lambdalisue]

Summary

• Rename organization references from jsr-probitas to probitas-test across all packages
• Update documentation (README.md) with new organization name
• Update Docker Compose configuration with new repository URLs
• Update Nix environment configuration (flake.lock)
• Update project dependencies (deno.lock)

Why

This organizational rename consolidates the project structure under a dedicated test organization (probitas-test) to better reflect the project's purpose and align with the repository naming conventions. The previous jsr-probitas organization name suggested a JSR (JavaScript Registry) focus, while the new name clarifies this is a test organization for the Probitas framework.

The rename ensures:

• Clearer organizational identity for the Probitas testing framework
• Consistency across all package references and documentation
• Updated external service configurations (Docker Compose services)
• Proper dependency resolution with updated lockfiles

Test Plan

• Verify all package module references are updated correctly
• Confirm Docker Compose services start with new repository URLs
• Run deno task verify to ensure no broken imports or type errors
• Verify all packages can be imported and used correctly
• Check that documentation links are accessible and accurate