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/sys/dcli.go

@@ -1,14 +1,14 @@
 package sys
 
 import (
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
 func init() {
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "dcli",
 		Description: "Display help for command",
-		Subcommands: []core.Subcommand{
+		Subcommands: []spec.Subcommand{
 			{Name: "sync", Description: "Manually synchronize the local vault with Dashlane"},
 			{Name: "read", Description: "Retrieve a secret from the local vault via its path"},
 			{Name: "path", Description: "Path to the secret (dl://<title>/<field> or dl://<id>/<field>)"},
@@ -38,7 +38,7 @@ func init() {
 			{Name: "backup", Description: "Backup your local vault (will use the current directory by default)"},
 			{Name: "logout", Description: "Logout and clean your local database and OS keychain"},
 		},
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-i", Description: "Input file of a template to inject the credential into"},
 			{Name: "-o", Description: "Output file to write the injected template to"},
 			{Name: "--print", Description: "Prints just the OTP code, instead of copying it to the clipboard"},