Better usage of remotes to install packages

[KevCaz]

For some reason, I created a handful functions to download packages from CRAN, repo, .... Those functions basically called install.packages after downloading the files. Given that we are already using a DESCRIPTION file and remotes, it'd be better to callinstall_deps() and use pkg.yaml as little as possible (only when packages are archived, and we avoid using those packages).

[KevCaz]

WIP! old way to install package will be progressively removed but will be kept as a gist
https://gist.github.com/KevCaz/da8fb99b861fbeb9ba7365ed8c04d643

[KevCaz]

Just need to remove all pkg.yaml files from workshop. Looks like a work around for archived package is to use METACRAN's GitHub https://github.com/cran