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

go.mod

@@ -2,18 +2,20 @@ module super-frpc
 
 go 1.24.0
 
-require modernc.org/sqlite v1.46.1
+require (
+	github.com/BurntSushi/toml v1.4.0
+	github.com/gorilla/websocket v1.5.3
+	golang.org/x/sys v0.37.0
+	modernc.org/sqlite v1.46.1
+)
 
 require (
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
-	github.com/gorilla/websocket v1.5.3 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/ncruces/go-strftime v1.0.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
-	golang.org/x/sys v0.37.0 // indirect
-	gopkg.in/ini.v1 v1.67.1 // indirect
 	modernc.org/libc v1.67.6 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
 	modernc.org/memory v1.11.0 // indirect