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/amplify.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:        "amplify",
 		Description: "Environment",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "push", Description: "Provisions cloud resources with the latest local developments"},
 			{Name: "delete", Description: "Deletes all of the resources tied to the project from the cloud"},
 			{Name: "add", Description: "Adds a resource for an Amplify category in your local backend"},
@@ -28,7 +28,7 @@ func init() {
 			{Name: "get", Description: "Displays the environment details"},
 			{Name: "import", Description: "Imports an environment"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-y", Description: "Answer all question as 'Yes'"},
 			{Name: "-v", Description: "Deletes all of the resources tied to the project from the cloud"},
 			{Name: "--restore", Description: "Overwrite your local changes"},