Add support for zig stack. (#43)

Add scala-cli to the scala development stack

Make "tui" feature option more descriptive in interactive init

Fix mitmproxy healthcheck race: also require CA cert

Fix permissions

Fix version

Fix naming

Rename app-home volume to agent-home for consistency with service name

Fix Dockerfile ampersand escaping under Bash compat32 mode

Fix malformed Dockerfile when scala stack contains ampersands

Fix malformed devcontainer.json when stack extensions are added

Install sbt alongside scala in stack selection

Move mitmproxy test out of templates directory

Add ripgrep, fd, and fzf to app container

Add default tmux config to app container