feat: 1.4.8 - Keybind schemas, transparent mode, fixes

Added

Experimental: improved TUI for pickClass(), pickName() using s4c-gui
Add GameOptions for runtime settings
- Can be changed at any time from menu (open with m).
- Experimental: add new binfile for storing the settings
Add HLPD_Key, hlpd_default_keybinds as base to support customizable keybinds
- For now, just a rigid set of 3 schemas is available (mutually exclusive): ARROW_KEYS,VIM_KEYS, WASD_KEYS.
- Run with -j to use VIM_KEYS at start, -w to use WASD_KEYS at start
- Closes #88
Add optional usage of terminal's default colors (to support transparent background for the game).
- Run with -b to use this option at start
- Needs support from your ncurses library for reset_color_pairs(), which is an extension to ncurses. It may be available when building using ncurses's ABI 6.
- Builds missing this support are unable to use this option. If your build is stuck with this option off, you may try to rebuild your ncurses library from source.
- Closes #87
Collect BSP_Room tree for each bsp gen in gamestate_kls
- Currently only used by dbg_BSP_Room() on the root
Add WIP draw_BSP_Room()

Most curses menu wrap around
- When going up from first item or down from last, wrap to the other side
Experimental: Use int32_t for enum types in ser.h
- Updates #80
Renamed ctrl_c_handler() to hlpd_sigint_handler()

Fix: proper check for ncurses version for log
Fix: clear gamestate->current_room after finishing one
- Closes #86
Fix typo in header
- Closes #85
Fix: drop useless left/right pick for get_saveslot_index()
- Closes #91
Fix: move anvil__helapordo.h inclusion to game_utils.h
- Should make the starting info show anvil info instead of Built without anvil incorrectly
Fix: place player at home coords with -X after Boss kill