starting on config files

src/config/entity.rs

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+pub const DEFAULT_VIEWSHED_STANDARD: i32 = 16; // Standard viewshed radius for almost all entities.
+
+pub const NORMAL_SPEED: i32 = 12; // Normal speed for almost all entities.
+pub const TURN_COST_MULTIPLIER: i32 = 4; // How many ticks per turn for an entity with NORMAL_SPEED.

src/config/mod.rs

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+pub mod entity;