This commit introduces cljstyle linting for Clojure source files as a new action in GitHub workflow. Usage, rules, and styling configurations are added and properly integrated into the existing linting process. The configuration of `bb.edn` is adjusted accordingly to incorporate the cljstyle check and fix tasks.

This commit applies a uniform style to argument lists and function definitions in Clojure files. These changes improve code readability and maintainability by standardizing the structure and spacing of parentheses, line breaks, and indentation across various functions and requirements imports.

This commit tidies up test function formatting in ex_1_11_test.clj. It aims to improve code legibility and maintenance by standardizing the arrangement of parentheses and line breaks in the test functions.

A cljstyle check has been added in the GitHub workflows configuration file, main.yml. This bolsters the code formatting efforts by including checks for Clojure style conventions, aiming to improve and standardize the overall code legibility.