Merge branch 'main' into freeze-version

.devcontainer/.gitignore

.devcontainer/README.md

.devcontainer/VERSION_MATRIX.md

.devcontainer/devcontainer.json

.devcontainer/ghc-9.2/devcontainer.json

.devcontainer/ghc-9.4/devcontainer.json

.devcontainer/ghc-9.6/devcontainer.json

.devcontainer/ghc-9.8/devcontainer.json

.gitattributes

.gitignore

.gitlab-ci.yml

.hadolint.yml

.markdownlint.yml

CODE_OF_CONDUCT.md

README.md

SECURITY.md

VERSION_MATRIX.md

latest.Dockerfile