Merge bin/mocha and bin/_mocha

[segrey]

Tools providing integration with mocha need to use bin/_mocha sometimes. For example, debugging mocha test is possible with bin/_mocha only, because it's impossible to pass --debug-brk=<port> option to _mocha child process from bin/mocha.
Well, it's easy for IDE to use bin/_mocha under the hood, but it might be not so obvious for users who debug mocha tests using node-inspector. Though, there is a hint, one need to take it into account. Also, debugging npm script that runs mocha tests leads to the same confusion (e.g. this WebStorm issue).

Related to #1969 (comment) //cc @boneskull
Please merge bin/_mocha and bin/mocha to have single public main script file in mocha3. Thanks.

[boneskull]

Yes, having one (1) executable is definitely on the todo list.

[ScottFreeCode]

See also #2517, the --node-arg flag in npx (which is bundled with newer versions of npm), and the ability to just say node <arguments> node_modules/mocha/bin/mocha.

[github-actions]

This issue hasn't had any recent activity, and I'm labeling it stale. Remove the label or comment or this issue will be closed in 14 days. Thanks for contributing to Mocha!

[segrey]

Would be great to have a single executable.

[github-actions]

This issue hasn't had any recent activity, and I'm labeling it stale. Remove the label or comment or this issue will be closed in 14 days. Thanks for contributing to Mocha!