Merge branch 'ui-color-reintegration' into 'main'

frontend/src/components/Admin/AddUser.tsx

frontend/src/components/Admin/DeleteUser.tsx

frontend/src/components/Admin/EditUser.tsx

frontend/src/components/Assignment/UploadSubmission.tsx

frontend/src/components/Common/NotFound.tsx

frontend/src/components/Common/Sidebar.tsx

frontend/src/components/Common/SidebarItems.tsx

frontend/src/components/UserSettings/ChangePassword.tsx

frontend/src/components/UserSettings/DeleteConfirmation.tsx

frontend/src/components/UserSettings/UserInformation.tsx

frontend/src/components/WorkOrder/AddWorkOrder.tsx

frontend/src/components/WorkOrder/ShareWorkOrder.tsx

frontend/src/components/ui/button.tsx

frontend/src/components/ui/provider.tsx

frontend/src/routes/login.tsx

frontend/src/routes/signup.tsx

frontend/src/theme.tsx