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/ssh.go

@@ -6,10 +6,10 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 )
 
-func sshHostGenerator(tokens []string, _ string, _ string) []core.Suggestion {
+func sshHostGenerator(tokens []string, _ string, _ string) []spec.Suggestion {
 	home, err := os.UserHomeDir()
 	if err != nil {
 		return nil
@@ -21,7 +21,7 @@ func sshHostGenerator(tokens []string, _ string, _ string) []core.Suggestion {
 	}
 
 	seen := make(map[string]bool)
-	var results []core.Suggestion
+	var results []spec.Suggestion
 
 	for _, path := range paths {
 		f, err := os.Open(path)
@@ -45,7 +45,7 @@ func sshHostGenerator(tokens []string, _ string, _ string) []core.Suggestion {
 					continue
 				}
 				seen[host] = true
-				results = append(results, core.Suggestion{Cmd: host, Desc: "ssh host"})
+				results = append(results, spec.Suggestion{Cmd: host, Desc: "ssh host"})
 			}
 		}
 		_ = scanner.Err()
@@ -56,7 +56,7 @@ func sshHostGenerator(tokens []string, _ string, _ string) []core.Suggestion {
 }
 
 func init() {
-	sshOptions := []core.Option{
+	sshOptions := []spec.Option{
 		{Name: "-p", Description: "port"},
 		{Name: "-i", Description: "identity file"},
 		{Name: "-L", Description: "local port forward"},
@@ -69,18 +69,18 @@ func init() {
 		{Name: "-X", Description: "x11 forwarding"},
 	}
 
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "ssh",
 		Description: "secure shell",
 		Generator:   sshHostGenerator,
 		Options:     sshOptions,
 	})
 
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "scp",
 		Description: "secure copy",
 		Generator:   sshHostGenerator,
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-r", Description: "recursive"},
 			{Name: "-p", Description: "port"},
 			{Name: "-i", Description: "identity file"},
@@ -88,11 +88,11 @@ func init() {
 		},
 	})
 
-	core.Register(&core.Spec{
+	spec.Register(&spec.Spec{
 		Name:        "rsync",
 		Description: "remote sync",
 		Generator:   sshHostGenerator,
-		Options: []core.Option{
+		Options: []spec.Option{
 			{Name: "-av", Description: "archive + verbose"},
 			{Name: "-z", Description: "compress"},
 			{Name: "--delete", Description: "delete extraneous"},