feat(prelude): Introduce prelude.tmpl
prelude.tmpl will replace setup.tmpl for all templates that run as tasks under an agent. It is streamlined to omit extra code to install drpcli and set environment variables that the agent makes sure are set.
prelude.tmpl will replace setup.tmpl for all templates that run as tasks under an agent. It is streamlined to omit extra code to install drpcli and set environment variables that the agent makes sure are set.