quadratic.h: added std::move in constructors

[pasabanov]

Types of changes

• Refactoring, reformatting, cleanup

Related: #30

Description

Added std::move in constructors in quadratic.h for consistency with other files (step.h, cubic.h).

In addition to moving the Number variables, the SizeT variables were also moved.
The move can be removed for SizeT, since it is trivially copyable by default, but it can be changed by user; also std::move indicated a logical move, even if the value is in fact copied.

Clang-Tidy warns about using std::move on trivially copyable type: https://clang.llvm.org/extra/clang-tidy/checks/performance/move-const-arg.html.
It is recommended to configure this check by turning off the CheckTriviallyCopyableMove option.
In CLion this can be achieved by turning off hicpp-move-const-arg.CheckTriviallyCopyableMove and performance-move-const-arg.CheckTriviallyCopyableMove options.