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

root/wrapper.go

@@ -17,7 +17,7 @@ import (
 	"time"
 
 	"github.com/creack/pty"
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 	"github.com/versenilvis/iris/config"
 	"github.com/versenilvis/iris/integration"
 	"github.com/versenilvis/iris/integration/shell"
@@ -118,7 +118,7 @@ func runWrapper() {
 	defer func() { _ = ptmx.Close() }()
 
 	_ = pty.InheritSize(os.Stdin, ptmx)
-	core.ShellPID = c.Process.Pid
+	spec.ShellPID = c.Process.Pid
 
 	logger.Infof("PTY child shell started: shell=%s, path=%s, pid=%d", shellName, adapter.GetShellPath(), c.Process.Pid)
 
@@ -216,9 +216,9 @@ func runWrapper() {
 	pendingUpdate = startBackgroundUpdateCheck()
 	updatePrinted := false
 
-	shellPGID, err := unix.Getpgid(core.ShellPID)
+	shellPGID, err := unix.Getpgid(spec.ShellPID)
 	if err != nil {
-		shellPGID = core.ShellPID
+		shellPGID = spec.ShellPID
 	}
 	var isCommandActive atomic.Bool
 	isExecuting := func() bool {
@@ -561,7 +561,7 @@ func runWrapper() {
 							results := MergeResults("", currentMode)
 							if len(results) > 0 {
 								limit := min(len(results), 100)
-								var historyList []core.Suggestion
+								var historyList []spec.Suggestion
 
 								if inputSlice[i+2] == 'A' {
 									for j := limit - 1; j >= 0; j-- {
@@ -888,7 +888,7 @@ func runWrapper() {
 							var target string
 							var ok bool
 							if isSpaceAlias {
-								target, ok = core.GetAlias(naiveBuffer)
+								target, ok = spec.GetAlias(naiveBuffer)
 							}
 							bufferMu.Unlock()