mach: Implement basic resource loading system

Curently no real management has been implemented. It just loads the
resource from the list of paths present and provides the raw data from
it.

src/main.zig

@@ -2,3 +2,4 @@ pub usingnamespace @import("structs.zig");
 pub usingnamespace @import("enums.zig");
 pub const Engine = @import("Engine.zig");
 pub const Timer = @import("Timer.zig");
+pub const ResourceManager = @import("resource/ResourceManager.zig");