Add Dev Container Configuration Files

.devcontainer/.gitignore

.devcontainer/Dockerfile

.devcontainer/GHC.Dockerfile

.devcontainer/LICENSE

.devcontainer/README.md

.devcontainer/assets/screenshots/manageHLS.png

.devcontainer/backups/.keep

.devcontainer/bind-mounts/.keep

.devcontainer/conf/etc/stack/config.yaml

.devcontainer/devcontainer.json

.devcontainer/ghc-9.2/devcontainer.json

.devcontainer/ghc-9.4/devcontainer.json

.devcontainer/ghc-9.6/devcontainer.json

.devcontainer/scripts/etc/skel/.local/bin/checkForUpdates.sh

.devcontainer/scripts/usr/local/bin/fix-chsh.sh

.devcontainer/scripts/usr/local/bin/onCreateCommand.sh

.hadolint.yaml

README.md