(feat): toggling extensions

[hjbdev]

This PR adds functionality for toggling extensions in the php.ini with pvm extensions <enable|disable> <ext>

[HerrSammyDE]

When can we expect the update?

[hjbdev]

still needs some work from my end, will try and get it done in January

[Lotti]

I'd like to contribute to this feature (probably somewhere in February, hoping to have some spare hours at work) by introducing download and install of already built dll from pecl registry.
Unfortunately the pecl registry website is a bit tedious to navigate and parse so it will be require lots of http calls if I will not find a better interface for determine what is the latest release of extension X compatible with php Y.