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/valet.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:        "valet",
 		Description: "Do not output any message",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "diagnose", Description: "Output diagnostics to aid in debugging Valet"},
 			{Name: "fetch-share-url", Description: "Get the URL to the current share tunnel (for Expose or ngrok)"},
 			{Name: "forget", Description: "Remove the current working (or specified) directory from Valet's list of paths"},
@@ -46,7 +46,7 @@ func init() {
 			{Name: "share-tool", Description: "Get the name of the current share tool (Expose or ngrok)"},
 			{Name: "status", Description: "Output the status of Valet and its installed services and config"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-h", Description: "Do not output any message"},
 			{Name: "-V", Description: "Display this application version"},
 			{Name: "--ansi", Description: "Force (or disable --no-ansi) ANSI output"},