refactor(frpc): replace ini with toml for config handling and improve proxy management

- Replace ini package with toml for more reliable config parsing
- Refactor proxy management to use structured config instead of string manipulation
- Add proper error handling for config operations
- Clean up unused imports and improve code organization
- Update go.mod dependencies accordingly

postLog/logBroadcaster.go

@@ -5,9 +5,9 @@ import (
 )
 
 type LogMessage struct {
-	Level      int    `json:"level"`
-	Content    string `json:"content"`
-	Timestamp  string `json:"timestamp"`
+	Level     int    `json:"level"`
+	Content   string `json:"content"`
+	Timestamp string `json:"timestamp"`
 }
 
 type Client struct {