When generating a plugin, --type should shows as required

[maisarissi]

When running kiota plugin add, the command should show all required parameters, --openapi, --plugin-name and --type

[andrueastman]

@maisarissi Should we be updating the spec to remove the default value?

I believe the issue here is that if its required and has a default value, not providing the value will fall back to the openAi type.
https://github.com/microsoft/kiota/blob/main/specs/cli/plugin-add.md?plain=1#L49

[maisarissi]

Spec updated: #4477