Renv2

[VincentGuyader]

• feat: In dock_from_renv, introduce build-arg RENV_PATHS_CACHE (default /root/.cache/R/renv) and propagate it as an ENV variable for configurable renv cache paths.
• feat: In dock_from_renv, update cache mounting to --mount=type=cache,id=renv-cache,target=${RENV_PATHS_CACHE} and use renv::restore(clean=FALSE) to speed up and harden the Docker build.

[Copilot]

Pull Request Overview

This PR introduces configurable renv cache paths by adding a build argument and environment variable and updates the cache mounting mechanism in the Docker build to speed it up and improve its robustness.

• Adds ARG and ENV declarations for RENV_PATHS_CACHE in Dockerfiles.
• Updates invocations of renv::restore to use clean = FALSE and dynamically set cache target.
• Updates version and documentation to reflect the new behavior.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/testthat/renv_Dockerfile	Adds ARG/ENV for RENV_PATHS_CACHE and updates cache mount with dynamic target.
tests/testthat/Dockerfile	Removes an outdated Dockerfile in favor of the new configuration.
dockerfiler.Rproj	Adds a unique ProjectId to the project file.
R/dock_from_renv.R	Introduces ARG/ENV support and updates renv restore command for improved performance.
NEWS.md	Documents the new features and updates.
DESCRIPTION	Updates the version to reflect the new development release.