w is now a real and follows the rules:

- [0..1]: defines a percentage of limit loop where the kappa is not
  used. For example -p w:0.5 -p limit:100 gives 50 loop without kappa
  computation and 50 with kappa computation.

- > 1: defines a static number of loop without kappa computation. For
  examples -p w:50 -p limit:-1 gives 50 loop without kappa and +oo with
  kappa computation.

The value of each variables in the solution/initial vector is
initialized according to the init-policy-random parameter of the
bernouilli's law:

- 1 use the init-policy algorithm to affect 0 or 1.
- 0 use the toss up algorithm (init-random parameter and the
  bernouilli's law) to affect 0 or 1.

To improve the use in command line interface, graphical user interface
or R, we replace, only for computation output (ex.: remaining
constraint message, new solution found, etc.), the output message
stream using private functions debug(ctx, ...), info(ctx, ...),
warning(ctx, ...)  interface with callback mechanism in the
baryonyx::context class. (Closes: #28)

Enable the clang-tidy program on common checks.

To show all checks:
$ clang-tidy --list-checks --checks='*'

To select only modernize checks:
$ clang-tidy --list-checks --checks='-*,modernize-*'

Replace specific Linux/Unix source code about color
in (pseudo)terminal with the fmt::text_style and fmt::terminal_color
enumeration.

Replace the old preprocessing option with new one but without description (p1,
p2, p3 and p4).