Function bit

bit(n: number): number
Creates a bitmask for a single bit at position n.
Parameters
- n: number
  Zero-based bit position (0 = least-significant bit)
Returns number
A unsigned 16-bit integer with only bit n set
Example
```
bit(0)  // 0b0001 = 1
bit(5)  // 0b0010_0000 = 32
bit(15) // 0b1000_0000_0000_0000 = 32768
```
- Defined in src/utils.ts:17