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/hasura.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:        "hasura",
 		Description: ".env filename to load ENV vars from",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "actions", Description: "Manage Hasura actions"},
 			{Name: "codegen", Description: "Generate code for actions"},
 			{Name: "create", Description: "Create a Hasura action"},
@@ -41,7 +41,7 @@ func init() {
 			{Name: "update-cli", Description: "Update the CLI to latest or a specific version"},
 			{Name: "version", Description: "Print the CLI version"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "--envfile", Description: ".env filename to load ENV vars from"},
 			{Name: "-h", Description: "Help for hasura"},
 			{Name: "--log-level", Description: "Log level"},