KaTeX resource optimizations
KaTeX resource optimizations

Allow KaTeX to load only for "post" pages (post as layout)
dinglixiang/dinglixiang.github.io,PredictiveEcology/PredictiveEcology.org,timboe/timboe.github.io,rcanzanese/personal-website,Cyborg101/cyborg101.github.io,timboe/timboe.github.io,rohanchandra/type-theme,PredictiveEcology/PredictiveEcology.org,rcanzanese/personal-website,Cyborg101/cyborg101.github.io,dinglixiang/dinglixiang.github.io,timboe/timboe.github.io,PredictiveEcology/PredictiveEcology.org,Cyborg101/cyborg101.github.io,rohanchandra/type-theme,dinglixiang/dinglixiang.github.io,rohanchandra/type-theme