feat: implement core functionality for super-frpc service

This commit introduces the core functionality for the super-frpc service including:
- Configuration management
- User authentication and authorization
- Database integration
- FRPC instance management
- API endpoints for user operations
- Token-based authentication system
- Password hashing and validation

go.mod

@@ -0,0 +1,18 @@
+module super-frpc
+
+go 1.24.0
+
+require 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/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
+	modernc.org/libc v1.67.6 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+)