Import existing API definitions and convert to CRDs

[joshblakeley]

Expected Behavior

Often users will have existing Tyk deployments either in different environments to those using the Operator or in existing Tyk deployments where the operator is to be onboarded. To move to the operator a user must manually create the CRDs which can be an onerous task.

We should be able to import an existing API definition and where possible template it onto a new CRD and pass that back. Preferably just as a CLI command for automation.

The dashboard may then import the package that does this work and export CRDs from our Cloud and On premise API Managers.

Current Behavior

No real solution to this currently.

Possible Solution

One option is to use Go templating to pass values from an inputted API definition JSON and create a CRD