refactor(commands): separate commands and its core into two folders (#32)

- I think it would be better if one for commands only, one for the spec
handling core logic so people won't be confused by the core logic inside
the commands folder (cleaner I guess)
- Regen docs

commands/ops/okteto.go

@@ -1,14 +1,14 @@
 package ops
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "okteto",
 		Description: "Context",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "analytics", Description: "Enable / Disable analytics"},
 			{Name: "build", Description: "Build (and optionally push) a Docker image"},
 			{Name: "completion", Description: "Generate the autocompletion script for the specified shell"},
@@ -43,7 +43,7 @@ func init() {
 			{Name: "version", Description: "View the version of the okteto binary"},
 			{Name: "help", Description: "Help about any command"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "--loglevel", Description: "Amount of information outputted (debug, info, warn, error)"},
 			{Name: "--output", Description: "Output format (tty, plain, json)"},
 			{Name: "--disable", Description: "Disable analytics"},