add-install-docker-ci-e2e

Adds install command in install script, Docker build stage in Dockerfile, and CI jobs for docker build, install script, and embodied e2e test when introducing a new model or environment in RLinf. Use when adding a new embodied model (e.g. dexbotic), new env (e.g. maniskill_libero), or new model+env combination that should be installable, dockerized, and tested in CI.