feat: 1.4.9 Notifications overhaul, add config option for default background support, drop textfile saves legacy code

[jgabaut]

Added

• Embed info on previous releases for later use
• Added format macros for more Ser structs, for hlpd-save2l
• Add Notification to hold state for enqueue_notification()

Changed

• Move default terminal color support behind a feature flag
  • Now needs either
  • ./configure --enable-default-background to be used
  • or HELAPORDO_SUPPORT_DEFAULT_BACKGROUND to be defined before building
  • Closes #95
• Binary file save/load does not require -X anymore. It's still prone to change, so future saves are not guaranteed to respect backwards compatibility.
• Bsp floor generation does not require -X anymore.
• getopt() is called only once per execution, rather than once per run when using retry()
• Slim down gameloop() by collecting some preparation steps in new functions
• d in debug_generic() prints release data (currently unreachable)
• Refactor to drop notify_win argument in lower interfaces
• Refactor display_notification() to enqueue_notification()
  • Closes #98
• Increase size requirement for warning
• Increase notification window size
• Use s4c_display_sprite_at_coords() instead of s4c_animate_rangeof_sprites_at_coords() to handle SIGINT while on animation screen

Fixed

• Fix: load roomscompleted for roomsDone
• Fix: load floorscompleted for floors_done
• Fix: use in32_t for status field in Ser structures
  • Improves #80

Notes

• Add ringabuf at 0.0.4
• Pass color to printStatusText()
• WIP: Add plot_line_in_ncurses()
• Drop Story, Standard from Gamemode
• Drop -s to run with Story mode
• Drop textfile save/load interfaces
• Drop loreCounter from Path, SetPath
• Drop HELAPORDO_SAVEPATH_1