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/sys/kool.go

@@ -1,14 +1,14 @@
 package sys
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "kool",
 		Description: "Script",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "create", Description: "Create a new project using a preset"},
 			{Name: "preset", Description: "Preset that will be used to create the project"},
 			{Name: "folder", Description: "Folder where the project will be created"},
@@ -30,7 +30,7 @@ func init() {
 			{Name: "status", Description: "Show the status of all service containers"},
 			{Name: "stop", Description: "Stop and destroy running service containers"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "--verbose", Description: "Increases output verbosity"},
 			{Name: "--help", Description: "Help for create"},
 			{Name: "--container", Description: "Container target"},