tigrc: add .tigrc to improve tig response
tigrc: add .tigrc to improve tig response

Come from here,
https://github.com/jonas/tig/blob/master/contrib/large-repo.tigrc

Signed-off-by: Tinghan Shen <c9ff063c8de5b2a8e3ffacf80169ee51e722b470@mediatek.com>

tfing/config