add some more items to non discount

fix: ensure nails/threading services are excluded from discounts

chore: remove old packages

feat: implement role-based permissions

fix: some bugs while updating forms + QoL improvements

fix: make nails and threading non discountable

feat: add inventory management + bunch of fixes in settings and sales pages related to filtering

fixes in table view + new graphs for stylists

fix: issues in state management, re design settings layout

fix: add service grouping

fix: change JSX setting in tsconfig.json and sidebar state management

v0.5: poc ready for live testing (insane revamp ngl frfr)

init v0