[NFR]: Handoff to crest local

[niden]

There are two install roles:

• Global (composer global require phalcon/crest): runs new, up, down and install. These commands need no project.
• Per project (require --dev phalcon/crest, run as vendor/bin/crest): runs the project commands, such as make:*, route:list and container:list. They need the project's autoloader and the project's Phalcon, which a global crest cannot load.

The hand-off connects the two roles. When you type crest make:action ... in a project with the global crest, the global crest finds the project's vendor/bin/crest and runs it with the same arguments. It then returns that exit code. You type crest everywhere, and the correct crest runs.

In code, it needs these parts:

1. Find the project: search up from the working directory (or --directory) and look for vendor/bin/crest.
2. Sort the commands: decide which are host commands (the global crest runs them) and which are project commands (it passes them on).
3. Pass the command on: run the project crest with the same arguments and terminal, much as ShellRunner does now.
4. Stop loops: if the running crest is already the project's crest, it must not pass the command to itself.
5. Give a clear error: if there is no project crest, tell the user to run composer install or add phalcon/crest as a dev dependency.
6. Update the docs: they must stop telling users to type vendor/bin/crest.

[niden]

Resolved in #35