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

tests/dev/npm_ssh_test.go

@@ -8,7 +8,7 @@ import (
 	"testing"
 
 	_ "github.com/versenilvis/iris/commands"
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 	"github.com/versenilvis/iris/commands/js"
 )
 
@@ -33,7 +33,7 @@ func TestNpmScriptGenerator(t *testing.T) {
 		defer os.Remove(filepath.Join(tmp, "package.json"))
 
 		// ensure CWD is tmp
-		core.ShellPID = 0
+		spec.ShellPID = 0
 		_ = os.Chdir(tmp)
 
 		results := js.NpmScriptGenerator(nil, "", "")
@@ -154,7 +154,7 @@ Host !forbidden wildcard-test
 }
 
 // sshHostGeneratorFromPath is a helper that reads a specific ssh config path
-func sshHostGeneratorFromPath(configPath string) []core.Suggestion {
+func sshHostGeneratorFromPath(configPath string) []spec.Suggestion {
 	import_bufio := func() {
 		// using bufio in the same style as ssh.go
 	}
@@ -167,7 +167,7 @@ func sshHostGeneratorFromPath(configPath string) []core.Suggestion {
 	defer func() { _ = f.Close() }()
 
 	seen := make(map[string]bool)
-	var results []core.Suggestion
+	var results []spec.Suggestion
 
 	scanner := strings.NewReader("")
 	_ = scanner
@@ -187,7 +187,7 @@ func sshHostGeneratorFromPath(configPath 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"})
 		}
 	}
 	return results