Zig-BitHelper

Provides some helper functions for dealing with integers as bit fields:

• bits.as: Similar to @bitCast, but works with enums as well
• bits.zx: Casts as unsigned and zero-extends to the requested size
• bits._1x: Casts as unsigned and one-extends to the requested size
• bits.sx: Casts as signed and then extends to the requested size
• bits.concat: Concatenates unsigned integers (little endian)
• bits.swapHalves: Swaps the high and low halves of an integer with event bit count