Changes in local and platform set of commands

[jorgemoralespou]

New command group local for everything that has to do with local development cluster setup, that is cluster creation, registry, secrets, resolver and config

Cluster creation uses --local-config or --config to provide a configuration file. Will always sync the secrets and augment the configuration.

New command to view configuration for the platform, instead of --show-packages values in admin platform deploy, there's now a admin platform config view that also can show the config in the cluster with educates admin platform values --from-cluster

Added some examples to the commands and refactored some code for better reusability.

There's the option to use NULL as keyword for --config flag to use the default/empty configuration for kind (nip.io and default packages)

Closes #431 Closes #432

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[GrahamDumpleton]

Not sure I see the need for special --config NULL when running educates local config view. When would you want this?

Not exactly the same result, but can use:

educates local config view --config <( echo '{"clusterInfrastructure":{"provider":"kind"}}')

or:

educates admin platform values --config <( echo '{"clusterInfrastructure":{"provider":"kind"}}')

[GrahamDumpleton]

Going to merge so can do build. Deal with NULL config question after.