Function getEC2FamilyCategory

getEC2FamilyCategory(family: EC2InstanceFamily): EC2Category
Get the category for an EC2 instance family.
Parameters
- family: EC2InstanceFamily
  The instance family (e.g., "M5")
Returns EC2Category
The category (e.g., "general_purpose")
Example
```
import { getEC2FamilyCategory } from 'aws-instance-info'

const category = getEC2FamilyCategory('M5')
console.log(category) // 'general_purpose'

const category2 = getEC2FamilyCategory('C7')
console.log(category2) // 'compute_optimized'
```
- Defined in ec2.ts:156