Function build_brc20_reveal_script

Builds the BRC-20 reveal script that contains the JSON token deployment data. The reveal script follows the same Ordinals protocol format as text inscriptions, but uses "application/json" as the content type and structures the data according to the BRC-20 specification for fungible tokens. The script has two execution paths: 1. Normal path: Verify signature against internal_key (for spending aut

(internal_key: &XOnlyPublicKey, brc20_json: &str)