RPG: Borrow some concepts from Wesnoth

[CHiPs44]

Default times and conditions (https://wiki.wesnoth.org/TimeWML#Ready-made_times_and_schedules):

{DAWN}
{MORNING}
{MIDDAY}
{AFTERNOON}
{DUSK}
{FIRST_WATCH}
{MIDNIGHT}
{SECOND_WATCH}
{INDOORS}
{UNDERGROUND}
{DEEP_UNDERGROUND}

Alignment changes units efficiency in conjunction with day time:

• chaotic: -25% on daylight, +25% at night
• neutral
• lawful: -25% at night, +25% at daylight (?)
• liminal

Terrain https://wiki.wesnoth.org/Terrain_Terms gives maluses and bonuses depending on units:

• elves have 70% hit rate when they are in forests
• units in swallow water suffer a malus
• ...