Fix tools CLI future import placement and remove duplicated shim

[Victor-Dixon]

Motivation

• Fix a SyntaxError from from __future__ import annotations not being at the top of tools/cli.py which broke CI.
• Enforce the SSOT intent that tools/cli.py is the single entry point for python tools/cli.py usage.
• Remove duplicated shim content to avoid confusing or conflicting entry points.
• Keep the file structure concise and under the project's Python LOC constraints.

Description

• Removed the duplicated CLI shim block so from __future__ import annotations remains at the top of tools/cli.py.
• Consolidated to a single main() implementation and the if __name__ == "__main__": guard invoking main().
• Kept routing logic between the toolbelt and unified dispatcher intact via ToolRegistry, toolbelt_main, and unified_main.
• No public API or runtime behavior changes beyond the import placement and cleanup.

Testing

• No automated tests were run for this PR.
• The repository CI previously failed with a SyntaxError caused by the misplaced future import, and this change addresses that specific error.

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Codex Task

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Note

Resolves a CI-breaking SyntaxError and simplifies the CLI entrypoint while preserving behavior.

• Moves from __future__ import annotations to the top of tools/cli.py
• Removes duplicated shim content and consolidates to a single main() and if __name__ == "__main__" guard
• Retains routing logic between toolbelt and unified dispatcher via ToolRegistry, toolbelt_main, and unified_main

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