Function getSmallest

getSmallest(value, decimals?): string
get the smallest decimal string representation if the value is less than what can be represented with the given decimals
Parameters
- value: string | number
- Optional decimals: number
Returns string
Warn
only works with string which is a valid number and not a string bigint

Example
```
getSmallest('100', 2) // '100'
getSmallest('0.009', 2) // '< 0.01'
getSmallest('-0.007', 2) // '< -0.09'
```