Add "Composer Preload" plugin

[Ayesh]

Hi Jens,
Please consider adding "Composer Preload" plugin to the list.

This is a shameless self plug, but I genuinely believe this plugin serves a useful purpose. It adds a new "composer preload" command that, when run, creates a vendor/preload.php file that can cache a configurable list PHP files to opcache, speeding up execution of the app.

This can come really handy when phone 7.4 comes with Preload RFC implemented.

Thanks,
Ayesh.

[jakoch]

Hey Ayesh,

so, the generated file contains a list of opcache_compile_file() entries.
And in the end you would set opcache.preload=vendor/preload.php or trigger this from the app itself, right? Ok, why not... it's an alternative to https://github.com/jderusse/composer-warmup (which is already in the list).

Referencing the Preload RFC: https://wiki.php.net/rfc/preload

Thanks for contributing. 👍
Regards Jens

[Ayesh]

Thanks, the other plugin looks pretty interesting too, although it has a different approach to warm up.

Thanks for accepting the PR!

Cheers
Ayesh.