I added this to avoid making mistakes when using multiple contexts, hope
you find it useful.

Requirements
  kubectx and kubens from https://github.com/ahmetb/kubectx in PATH

Configuration

  "k8s": {
    "ltrim": bool,
    "rtrim": bool,
    "symbol": bool,
    "max_context": number,
    "max_namespace": number,
    "colorize": bool,
    "colorize_symbol": bool
  },

ltrim, rtrim: do not add space at left or right (compatibility with some
theme mods)

symbol: show k8s symbol

max_context, max_namespace: cut with an ellipsis context or namespace,
use 0 to supress output

colorize, colorize_symbol: auto-colorize based on the information string

Theme
  K8S_FG = 57
  K8S_BG = 7
  K8S_SYMBOL_FG = 57