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/runner/symfony.go

@@ -1,14 +1,14 @@
 package runner
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "symfony",
 		Description: "Symfony Binary",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "cloud:clear-cache", Description: "Clear the CLI cache"},
 			{Name: "cloud:docs", Description: "Open the online documentation"},
 			{Name: "cloud:multi", Description: "Execute a command on multiple projects"},
@@ -60,7 +60,7 @@ func init() {
 			{Name: "cloud:environment:url", Description: "Get the public URLs of an environment"},
 			{Name: "cloud:environment:xdebug", Description: "Open a tunnel to Xdebug on the environment"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-h", Description: "Show help"},
 			{Name: "-q", Description: "Do not output any message"},
 			{Name: "--no-ansi", Description: "Disable ANSI output"},