[Installer] Add yq (for editing YAML configs)

[coolaj86]

Add yq

https://github.com/mikefarah/yq

We want to add yq because it can make configuring config.yml files (such as alacrittys config file) much easier than writing custom code.

It's written in go, so it works consistently across Windows, Mac, and Linux.

This could be as simple as copying _example, updating the github releases
info, and doing a find and replace on a few file system path names.

How to create a webi installer

Skills required

• Basic Command Line knowledge (mkdir, mv, ls, tar, unzip, variables)

Steps

1. Clone and setup the webi packages repo

   git clone git@github.com:webinstall/packages.git
   pushd packages/
   npm install

2. Copy the example template and update with info from Official Releases:
   https://github.com/mikefarah/yq/releases

   rsync -av ./_example/ ./yq/

   • update yq/release.js to use the official repo
   • Learn how yq unpacks (i.e. as a single file? as a .tar.gz? as
     a .tar.gz with a folder named yq?)
   • find and replace to change the name
     • update yq/install.sh (see bat and jq as examples)
     • update yq/install.ps1 (see bat and jq as examples)
3. Needs an updated tagline and cheat sheet
   • update yq/README.md
     • official URL
     • tagline
     • Switch versions
     • description / summary
     • General pointers on usage (and perhaps "gotchas")

It's also okay to have multiple people work on part of this (i.e. the Cheat
Sheet can be done independently from the install.sh)

[coolaj86]

Things to make sure we have in the README:

(see the yq docs on their homepage)

• how to set an existing value nested in an object
• how to set an existing value nested in an array
• how to create a new value
• how to delete a value

[proxium]

@coolaj86 I would like to take this.

[coolaj86]

@proxium Are you still interested in this?

[adithyasunil26]

Please check #169