Add functions for encoding and decoding base32

Why it matters

To provide native support for Base32 encoding and decoding, enabling users to efficiently convert data to and from Base32 format within ClickHouse queries. This solves the problem of handling Base32 without external tools or custom implementations, enhancing data processing capabilities.

How to use it

Use the newly introduced functions base32Encode() and base32Decode() in your SQL queries to encode binary data into Base32 string format or decode Base32 strings back to binary data respectively. Example:

SELECT base32Encode('ClickHouse'), base32Decode(base32Encode('ClickHouse'));