new modular CLI

[jstrachan]

the next phase of the modularity work is creating a new jx CLI based on small modular binary plugins.

The idea is to provide a similar CLI for jx 2.x or 3.x built from the ground up with binary plugins so it’s easier to incrementally refactor / replace / improve the code, it’s quality, reporting and testing.

As part of this effort it would be good to review the UX and try improve it so it’s more intuitive - while also allowing for more flexibility & to support different personas. Eg someone administrating Jenkins X versus a developer working on some microservices may want different CLI sub commands.

From a UX perspective we may want to align with other UX approaches - eg https://github.com/knative/client/blob/master/conventions/cli.md & integrate with other CLIs as plugins like tekton / istio CLIs?

There is a PoC for the new 3.x CLI at jenkins-x/jx-cli

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/lifecycle stale

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/lifecycle rotten

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