Add initial project structure with core functionality

- Created a new Go module named 'teleport' for secure port forwarding.
- Added essential files including .gitignore, LICENSE, and README.md with project details.
- Implemented configuration management with YAML support in config package.
- Developed core client and server functionalities for handling port forwarding.
- Introduced DNS server capabilities and integrated logging with sanitization.
- Established rate limiting and metrics tracking for performance monitoring.
- Included comprehensive tests for core components and functionalities.
- Set up CI workflows for automated testing and release management using Gitea actions.

go.mod

@@ -0,0 +1,19 @@
+module teleport
+
+go 1.23.5
+
+require (
+	github.com/miekg/dns v1.1.68
+	github.com/sirupsen/logrus v1.9.3
+	github.com/spf13/pflag v1.0.10
+	golang.org/x/crypto v0.40.0
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require (
+	golang.org/x/mod v0.24.0 // indirect
+	golang.org/x/net v0.41.0 // indirect
+	golang.org/x/sync v0.14.0 // indirect
+	golang.org/x/sys v0.34.0 // indirect
+	golang.org/x/tools v0.33.0 // indirect
+)