Allow `use-varnames-strict-mode` with a configuration option

[stdedos]

Is your feature request related to a problem? Please describe. When multiple execution contexts are defined (e.g. dev-env, pre-commit, CI), it will be nice to have a SSOT (https://en.wikipedia.org/wiki/Single_source_of_truth) of whether this option is enabled or not.

Describe the solution you'd like "For all of flake8's configuration streams" (e.g. .flake8, pyproject.toml), I can set use-varnames-strict-mode = true on the file, and flake8-variables-names picks it up.

Describe alternatives you've considered pre-commit has args to pass custom args to tools, but I cannot affect how the dev-env reacts to that. e.g. developers IDE may not by-default activate that setting, and, even if the developer remembers to run manually on the terminal flake8 --use-varnames-strict-mode, s/he will still get no feedback while writing code.

Additional context Add any other context or screenshots about the feature request here.