Add the alpha <resource> get command

[pPrecel]

Description

Changes proposed in this pull request:

• make the get template command

How to run it

1. add the following configmap to the cluster:

apiVersion: v1
data:
  rootCommand: |
    name: function
    description: Set of commands for managing Functions
    descriptionLong: Use this command manage Functions
  resource: |
    scope: namespace
    kind: Function
    version: v1alpha2
    group: serverless.kyma-project.io
  templateCommands: |
    get:
      description: "get functions"
      descriptionLong: "use this command to get functions from a cluster"
      parameters:
      - path: '.status.conditions[] | select(.type=="ConfigurationReady") | .status'
        name: "configured"
      - path: '.status.conditions[] | select(.type=="BuildReady") | .status'
        name: "built"
      - path: '.status.conditions[] | select(.type=="Running") | .status'
        name: "running"
      - path: ".spec.runtime"
        name: "runtime"
      - path: ".metadata.generation"
        name: "generation"
kind: ConfigMap
metadata:
  labels:
    kyma-cli/extension: resource
    kyma-project.io/module: function
  name: serverless.function.cli
  namespace: kyma-system

2. build the cli from this PR:

go build --output kyma-dev main.go

3. use command

./kyma-dev alpha --help

Related issue(s)

• Implement CLI commands for serverless module serverless#1247