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/src.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:        "src",
 		Description: "Interact with Sourcegraph from the command line",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "apply", Description: "Apply batch"},
 			{Name: "exec", Description: "Execute batch"},
 			{Name: "new", Description: "New batch"},
@@ -24,7 +24,7 @@ func init() {
 			{Name: "members", Description: "List organization members"},
 			{Name: "tag", Description: "Tag user"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-display", Description: "Log GraphQL requests and responses to stdout"},
 			{Name: "-explain-json", Description: "Explain the JSON output schema and exit"},
 			{Name: "-get-curl", Description: "Skip validation of TLD certificates against trusted chains"},