Sync updates with elichika

As of https://github.com/YumeMichi/elichika/commit/81a78e964dcdb8bb2d123237f966f95e7fba190e

Signed-off-by: Yuan Si <do4suki@gmail.com>

utils/utils.go

@@ -7,15 +7,23 @@ import (
 	"encoding/hex"
 	"math/rand"
 	"os"
+	"sync"
 	"time"
 )
 
+var (
+	rwMutex sync.RWMutex
+)
+
 func PathExists(path string) bool {
 	_, err := os.Stat(path)
 	return err == nil || os.IsExist(err)
 }
 
 func ReadAllText(path string) string {
+	rwMutex.RLock()
+	defer rwMutex.RUnlock()
+
 	b, err := os.ReadFile(path)
 	if err != nil {
 		return ""
@@ -24,6 +32,9 @@ func ReadAllText(path string) string {
 }
 
 func WriteAllText(path, text string) {
+	rwMutex.Lock()
+	defer rwMutex.Unlock()
+
 	_ = os.WriteFile(path, []byte(text), 0644)
 }