feat(devenv): adds Modules support

[nojhan]

This feature will display the list of loaded modules in the "dev env" section.

Configurable information: items versions, color, hashed color, marks.

Environment modules is a tool allowing for dynamic modification of a user's environment, which is quite ubiquitous in high-performance computing systems. https://modules.readthedocs.io

Refs: #763

Technical checklist:

• code follows our shell standards:
  • correct use of IFS
  • careful quoting
  • cautious array access
  • portable array indexing with _LP_FIRST_INDEX
  • printing a "%" character is done with _LP_PERCENT
  • functions/variable naming conventions
  • functions have local variables
  • data functions have optimization guards (early exits)
  • subshells are avoided as much as possible
  • string substitutions may be done differently in Bash and Zsh (use _LP_SHELL_*)
• tests and checks have been added, ran, and their warnings fixed:
  • unit tests have been updated (see tests/test_*.sh files)
  • ran test.sh
  • ran shellcheck.sh (requires shellcheck).
• documentation have been updated accordingly:
  • functions and attributes are documented in alphabetical order
  • new sections are documented in the default theme
  • tag .. versionadded:: X.Y or .. versionchanged:: Y.Z
  • functions signatures have arguments, returned code, and set value(s)
  • attributes have types and defaults
  • ran docs/docs-lint.sh (requires Python 3 and requirements.txt
    installed (cd docs/; python3 -m venv venv; . venv/bin/activate; pip install -r requirements.txt))

[Rycieos]

Looks good in general. Rebase onto latest master to fix the Shellcheck failure.