…template documentation

refactor(examples/potd): add docstring to handler function for clarity

refactor(template/bb): introduce wrap-arg function to handle functions with different arity

test(template/bb): add tests for new wrap-arg function and fn-arg-cnt utility

feat(examples/stack.yml): update image name to include language prefix for clarity

The changes include documentation updates to clarify the requirements for the handler function in the template, a refactor to support handler functions with different numbers of arguments, and additional tests to ensure the new functionality works as expected. The image name in the example stack configuration is also updated to be more descriptive.

…le-argument functions

ci: remove potd function definition from stack.yml

The changes remove the 'potd' service and its associated steps from the GitHub Actions workflow and the stack configuration. This is likely because the 'potd' service is no longer needed or has been deprecated.

feat(examples): add .gitignore to exclude common directories
refactor(examples): remove bb-hiccup function from stack.yml configuration

feat(stack.yml): register bb-hiccup and potd functions in stack configuration
refactor(template/bb/index.clj): use thread macro for fn-arg-cnt definition for better readability
test(template/bb/tests.clj): add test case for function with no arglists in index.clj

…r name

refactor(ci): remove quotes around numeric comparison in if condition for consistency

- Use underscore in variable name for consistency
- Quote variable expansion to ensure string length check works correctly

…ons workflow

The change fixes a syntax error in the shell conditional expression by removing the unnecessary `echo` command, ensuring the string length check for `bb_potd` is performed correctly.