Version compatibility

[martinshub-tech]

this pr closes #247

Pull Request: Add version compatibility checks for templates

Summary

Implemented robust CLI version compatibility validation for template selection in starforge new contract. This prevents scaffolding projects with incompatible templates.

Changes

• Updated src/commands/new.rs to replace strict compatibility assertion with detailed match handling.
• Added user‑friendly error messages for:
  • Template requires newer StarForge version.
  • Template does not support the current newer CLI version.
  • Malformed version metadata.
• Early exit on incompatibility to avoid partial scaffolding.

Verification

• Manual testing of starforge new contract with templates requiring different version ranges confirms correct warnings.
• Existing functionality unchanged for compatible templates.

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Branch: master (fork) tracking fork/master.
Upstream: origin/master (Nanle-code/StarForge).

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