Add plugin in zsh configuration and move linux configuration under folder

.zshrc

@@ -1,5 +1,6 @@
 # Fig pre block. Keep at the top of this file.
 [[ -f "$HOME/.fig/shell/zshrc.pre.zsh" ]] && builtin source "$HOME/.fig/shell/zshrc.pre.zsh"
+
 # If you come from bash you might have to change your $PATH.
 # export PATH=$HOME/bin:/usr/local/bin:$PATH
 
@@ -79,6 +80,7 @@ plugins=(
   docker
   docker-compose
   docker-machine
+  gem
   git
   git-auto-fetch
   git-extras
@@ -99,6 +101,8 @@ plugins=(
   profiles
   pylint
   python
+  rake
+  ruby
   themes
   tmux
   web-search
@@ -159,4 +163,3 @@ export NVM_DIR="$HOME/.nvm"
 
 # Fig post block. Keep at the bottom of this file.
 [[ -f "$HOME/.fig/shell/zshrc.post.zsh" ]] && builtin source "$HOME/.fig/shell/zshrc.post.zsh"
-