Initial commit: kport - SSH Port Forwarder TUI

- Interactive TUI for SSH port forwarding
- Reads from ~/.ssh/config for host selection
- Automatic port detection on remote hosts
- Manual port forwarding option
- Graceful error handling and connection timeouts
- Built with Bubble Tea framework

Co-authored-by: Ona <no-reply@ona.com>

.devcontainer/Dockerfile

@@ -0,0 +1,5 @@
+FROM mcr.microsoft.com/devcontainers/base:ubuntu-24.04
+
+# use this Dockerfile to install additional tools you might need, e.g.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>