Add NVM_LAZY_LOAD_EXTRA_COMMANDS option

[joerideg]

Here we go, I gave it a shot. It includes tests and documentation in README.md
Please review.

[joerideg]

Closes #66

[lukechilds]

Thanks for working on this!

Are you able to take another look at the test? It should probably be failing since the arrays aren't currently being merged properly.

[lukechilds]

vim may not exist on all machines where we run tests and ls could be called inside other functions inside zsh-nvm.

For the test vectors can you choose commonly available yet not that widely used binaries, and things we are unlikely to ever call in zsh-nvm.

whoami and hostname spring to mind.

[joerideg]

Good point, I'll use whoami

[lukechilds]

Can you change ls to hostname too. Otherwise if we use ls somewhere it could cause the test to start failing.

[joerideg]

Are you able to take another look at the test? It should probably be failing since the arrays aren't currently being merged properly.
Actually the tests worked before, I tried before pushing the MR.

I've added the changes and amended the commit.

[lukechilds]

@joerideg sorry, haven't had a chance to look at this, got some covid related craziness going on at my end. I haven't forgotten about it, I'll get round to it as soon as I'm able.

[lukechilds]

Apologies for the delay, I just got round to reviewing and testing this.

It works great, thanks!

If you could just make the minor tweaks I suggested this is good to be merged.

[joerideg]

@lukechilds I've updated the MR as requested.

[lukechilds]

Perfect, thanks @joerideg!