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/wrangler.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:        "wrangler",
 		Description: "Path to configuration file [default: wrangler.toml]",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "kv:namespace", Description: "Interact with your Workers KV Namespaces"},
 			{Name: "create", Description: "Create a new namespace"},
 			{Name: "delete", Description: "Delete namespace"},
@@ -34,7 +34,7 @@ func init() {
 			{Name: "login", Description: "Authenticate Wrangler with your Cloudflare username and password"},
 			{Name: "report", Description: "Report an error caught by Wrangler to Cloudflare"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-c", Description: "Path to configuration file [default: wrangler.toml]"},
 			{Name: "-e", Description: "Environment to perform a command on"},
 			{Name: "-h", Description: "Prints help information"},