Kevin Hart believes his ex-assistant Miesha Shakes should cough up a 5-figure sum for violating a confidentiality agreement where he says she agreed not to spill about him … TMZ has learned. According to court docs, obtained by TMZ, Kevin is asking a judge to order Miesha to pay $50K in agreed-upon damages for breaching a non-disclosure agreement she signed. Kevin sued Miesha, who worked for the entertainer from 2017 to 2020, after she did an interview with blogger Tasha K ’s  … where he says