Racket good first issues

This issue proposes a code action that would replace a generic `(all-defined-out)` export clause with an explicit list of all exported identifiers. This aims to improve code clarity and maintainability by making exports more specific.

This issue reports a bug in the Racket-Lua parser where hexadecimal numbers containing decimal points are not parsed correctly. The user provided a link to a pull request comment that likely contains more details and potentially a fix.

The `run-command` function in `private/run-command.rkt` has no test coverage. The task is to write tests for this function, covering scenarios like successful execution, missing executables, non-zero exit codes, and output to stderr.