Function formatZodiacPosition

formatZodiacPosition(longitude: number): string
Format ecliptic longitude as zodiac position string

Converts a raw ecliptic longitude into a human-readable zodiac position.
Parameters
- longitude: number
  Ecliptic longitude in degrees (0-360)
Returns string
Formatted string like "15°30' Aries"
Example
```
formatZodiacPosition(0)       // "0°00' Aries"
formatZodiacPosition(15.5)    // "15°30' Aries"
formatZodiacPosition(45.75)   // "15°45' Taurus"
```
- Defined in houses/house-utils.ts:258