Organization-wide CLI version policy

Admins can now bound the Fern CLI version that every project in an organization runs. Set a minimum, a maximum, or an exact version with fern org set cli-version, and each project runs the nearest allowed version. The bounds live on the organization, so no fern.config.json has to change. fern org get reports the policy and fern org unset cli-version clears it. fern upgrade respects the same bounds when it writes a new version.

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