feat: pop install

[AlexD10S]

pop install command to set up the environment for development by installing required packages.

Closes #110

Next steps can be:

• Improve the UX installation process with less messaging like in here: feat(up parachain): improve build ux #123
• Ideal to only install those required based on feature: contracts/parachain.

[evilrobot-01]

Great work! I think there are some missing items before this can be merged tho, just so that it is a little more robust in terms of QA and also has a consistent UX with the other commands, as noted.

Note that I do not use brew on mac so have not been able to test it manually there myself, but I did do so in a local Ubuntu container.

[Daanvdplas]

Removed homebrew from machine and tried to build pop cli. Unfortunately I needed cmake which also required me to install homebrew. After installing those I could build pop and run pop install.

The error message regarding cmake:

We should accommodate for homebrew and cmake in the readme

[AlexD10S]

We should accommodate for homebrew and cmake in the readme

This is an error to build pop. I have added a link to the documentation in the README for more information: https://learn.onpop.io/pop/v/pop-cli/welcome/installing-pop-cli

[Daanvdplas]

I left few sanity check questions but other than that it LGTM! This is a very important PR, thanks Alex!

[evilrobot-01]

A few last minor comments.

[evilrobot-01]

LGTM! 🚀