Deliverable Versioning: A Tool for Deliverable Version Discipline

The `deliverable-versioning` plugin aims to resolve the chaos in deliverable version management. Its core rules include: no in-place file modifications; new versions must be generated as new files with date-based naming; maintaining a single authoritative deliverable directory and a ledger to record submission history; and checking for existing files before creating a new version, with replacement files requiring traceable records. This tool relies on users strictly adhering to the discipline of ledger tracking and legacy cleanup to reestablish deliverable standards.