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/js/elm.go

@@ -1,14 +1,14 @@
 package js
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "elm",
 		Description: "Fig spec for the Elm language cli",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "reactor", Description: "Start an Elm development server"},
 			{Name: "port", Description: "The port number"},
 			{Name: "package", Description: "The name of the package to install"},
@@ -18,7 +18,7 @@ func init() {
 			{Name: "bump", Description: "Bump the version of your package"},
 			{Name: "diff", Description: "See what changed between versions of a package"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "--help", Description: "Show help for elm init"},
 			{Name: "--no-colors", Description: "Turn off colors in the repl"},
 			{Name: "--interpreter", Description: "Path to an alternate JS interpreter, such as Node or Deno"},