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.

.gitea/workflows/test-pr.yaml

@@ -0,0 +1,15 @@
+name: PR Check
+on:
+  - pull_request
+
+jobs:
+  check-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@main
+      - uses: actions/setup-go@main
+        with:
+          go-version-file: 'go.mod'
+      - run: go mod tidy  
+      - run: go build ./...
+      - run: go test -race -v -shuffle=on ./...