Provide a shell script for setting up dotfiles automatically

[mu-hun]

When setting up dotfiles on a new device, I've always found that copying and pasting multi-line commands is quite cumbersome.

Many Unix-based tools allow you to automatically install dependencies and configure them to suit your environment. For instance, Oh My Zsh:

sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

It would be beneficial to have an automation script that clones this repo and executes all the initial setup commands.

Additionally, if the client is on macOS, we could have a script that automatically installs brew and brew cask apps, sets up iterm2 configurations, and installs app store apps.

[mu-hun]

MacOS related TODO

• Backup system preferences and write it restore script with https://github.com/clintmod/macprefs
• Write a https://github.com/kiding/SokIM IME install and setup script.
  • Remove default English (US) input source.

[mu-hun]

I've start this job at 36f1812

• I don't know whether to run it with 'sh' or 'bash'. First of all, I used source for instant excution and chose bash by #!/usr/bin/env bash hashbang into all script files.
• Brew-related tasks must be bundled into a brewfile.