modularize monitor, reduce init usage (#81)

* kill process tree using syscall on windows & cleanup (#80)

* kill process tree using syscall on windows & cleanup

* use job api

* add error check for cmd.Start

* modularize monitor, reduce init usage

* replace slices with sort

* update gopsutil & other dependencies

pkg/pty/pty.go

@@ -1,5 +1,4 @@
 //go:build !windows
-// +build !windows
 
 package pty
 

pkg/pty/pty_windows.go

@@ -19,7 +19,7 @@ import (
 	"github.com/shirou/gopsutil/v4/host"
 )
 
-var isWin10 bool
+var isWin10 = VersionCheck()
 
 type winPTY struct {
 	tty *winpty.WinPTY
@@ -29,10 +29,6 @@ type conPty struct {
 	tty *conpty.ConPty
 }
 
-func init() {
-	isWin10 = VersionCheck()
-}
-
 func VersionCheck() bool {
 	hi, err := host.Info()
 	if err != nil {