fix(cli): fix Thor::UndefinedCommandError argument count

[dpaluy]

Summary

• Fixed Thor::UndefinedCommandError to pass correct 3 arguments (command, nil, all_commands.keys)
• Resolves "wrong number of arguments (given 1, expected 3)" error that prevented asdf from creating the railstart shim
• Version bumped to 0.2.1 with CHANGELOG update

Problem

When Thor tried to handle help commands or undefined commands, it would raise Thor::UndefinedCommandError with only the command string as argument. However, the Thor exception constructor expects exactly 3 arguments: the command name, nil, and a list of valid commands. This caused a crash that prevented asdf from properly creating the railstart executable shim.

Solution

Updated the exception instantiation in lib/railstart/cli.rb line 74 to provide all required arguments:

raise Thor::UndefinedCommandError.new(command, nil, self.class.all_commands.keys)

Files Changed

• lib/railstart/cli.rb: Fixed exception argument signature in CLI#help method
• lib/railstart/version.rb: Bumped version to 0.2.1
• CHANGELOG.md: Added entry documenting the fix

Test plan

• RuboCop linting passes (no offenses detected)
• Manual testing: railstart commands execute without exception errors
• Verified commit message follows conventional commits format
• CHANGELOG properly updated with fix documentation

Notes

This is a critical fix for the gem's executability - without this, asdf cannot properly integrate the railstart command shim.