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/datree.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:        "datree",
 		Description: "Help for",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "completion", Description: "Generate completion script for bash,zsh,fish,powershell"},
 			{Name: "config", Description: "Internal configuration management for datree config file"},
 			{Name: "get", Description: "Get configuration value"},
@@ -18,7 +18,7 @@ func init() {
 			{Name: "test", Description: "Test kustomization files"},
 			{Name: "version", Description: "Print the version number"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "--help", Description: "Help for 'test'"},
 			{Name: "--ignore-missing-schemas", Description: "Ignore missing schemas when executing schema validation step"},
 			{Name: "--no-record", Description: "Do not send policy checks metadata to the backend"},