[FEATURE] Use .utf8 instead of hex-encoding/decoding

[turbolent]

Issue to be solved

The templates to add a contract and update a contract assume the code parameter is hex-encoded.

Hex-encoding and hex-decoding is inefficient and unnecessary.

Suggest A Solution

Replace the use of .decodeHex() with .utf8.

This is a breaking change: Users of the templates need to be updated to pass the code as-is, without hex-encoding it.

What are you currently working on that this is blocking?

No response