Add Hello World example for Bracket Language (.bl)

[KamilMalicki]

Hello leachim6 team,

I’d like to propose adding the esoteric programming language Bracket Language (BL) to the hello-world collection.

Language name: Bracket Language

Repository: https://github.com/KamilMalicki/bracket-language

File extension: .bl

Example “Hello, World” script:
(print "Hello, World")`

Short description: Bracket Language is an esolang combining S-expression syntax (LISP style) with infix notation for arithmetic and logical operators. It’s open-source under Apache-2.0 licence.

Interpreter: available in the repo; users can run on Windows/Linux.

Thank you for considering the addition.
Kind regards,
Kamil Malicki