Updated Code; Duplex, Simplex

[QORTEC]

Duplex, Simplex

The following code explicitly sets the duplex/simplex in PCL.

if (page_params_.duplex && page_params_.tumble) {
  fputs("\033&l2S", out_);
} else if (page_params_.duplex) {
  fputs("\033&l1S", out_);
} else {
  fputs("\033&l0S", out_);
}

\033&l2S: This sets the printer to duplex printing with tumble mode.
\033&l1S: This sets the printer to duplex printing without tumble mode.
\033&l0S: This sets the printer to simplex (single-sided) printing.

#169 explicitly sets the printer in simplex mode (\033&l0S).
This resolves the issue of printers continuing to duplex when disabled.

QORTEC#2 adds duplex no tumble printing (\033&l1S).
This change also adds logic to print with and without tumble.

Compiling

QORTEC#3 fixes building on Fedora 38;
error: 'uint8_t' was not declared in this scope
Resolves , so uint8_t undeclared issue by explicitly including cstdint in test/tempfile.h.

[knkrth]

How to copy 2 side -> 2 side layout. On the official firmware there is only 1 side -> 2 side layout option available.