Consolidate the Android and Emscripten implementations of the string/
number input dialogs into input_modal.c, and split the input-dialog API
out of menu.h into input_modal.h.
With the blocking modal_run(), the game's main loop is frozen while a
menu is open, so the flag's input-suppression and VM-pause checks are
unreachable. Quit requested during a modal is now handled by closing the
modal and letting it propagate through the main loop.
Linux and macOS now both build the pure-SDL + microui menu. Remove GTK3
detection, the ENABLE_GTK build branches, and the GTK menu sources.
Decouple gettext NLS from ENABLE_GTK so menu labels stay translatable on all
desktop builds, and update i18n to the new sources (POTFILES.in, .pot, ja.po).
The font module kept a global "currently selected font" set by
font_select() and implicitly used when drawing. Make it stateless by
introducing a FontSpec {type, weight, size} that font_render_text() /
font_draw_text() and gfx_drawString() take directly.
Make FontWeight a two-valued enum and normalize the 1-9 weight to it
in commandZB().
Removes font_select(), ags_setFont() and ags_setFontWithWeight().
Instead of hardcoding "dDEMO.alk" / "tDEMO.alk", use the actual filename
stored in nact->files.alk[0] from the directory scan. This fixes loading
failures on case-sensitive filesystems where the actual file may be
named "dDemo.alk" or "tDemo.alk".
Also update gameresource.c to store .alk files without a numeric suffix
at index 0 (these games have only one .alk file).
This adds `sdl_surface` field to agsurface_t. `agsurface->pixel` is now
set to `agsurfae->sdl_surface->pixels`.
Note that the `sdl_surface` field does not have alpha; transparent
surfaces have a separate alpha plane in `agsurface->alpha`.
kichikuou