Add silver searcher ignore file
Add silver searcher ignore file

Searching on the ref tests would find matches in the terminal recording
files and completely screw up the screen state.

jwilm/alacritty,dannydulai/alacritty,jwilm/alacritty,jwilm/alacritty,alacritty/alacritty,alacritty/alacritty,jwilm/alacritty,dannydulai/alacritty