add source code search alias
add source code search alias

Search source code, then pipe files with 10 line buffer into fzf preview using bat.

Requirements:
- fzf: https://github.com/junegunn/fzf
- ag: https://github.com/ggreer/the_silver_searcher
- bat: https://github.com/sharkdp/bat


Notes: 
- if you want to replace ag for rg feel free (https://blog.burntsushi.net/ripgrep/)
- Same goes for bat, although ccat and others are definitely worse
- the $ext extraction uses a ZSH specific text globber
issmirnov/dotfiles,issmirnov/dotfiles,issmirnov/dotfiles,issmirnov/dotfiles