Tips of upgrading kusion version

[howieyuen]

Description

we need version upgrade tips for user , for example, when run kusion version cmd

Expectation

kusion version

warning: A new version of Kusion is available. To upgrade from version 'a.b.c' to 'x.y.z', run 
   $ kusionup reinstall [email protected]
or visit https://github.com/KusionStack/kusion/releases/ for manual instructions and release notes.
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