feat(Table.vue): add actions

feat: create 3 views

feat(Table.vue): externalize paging

feat(Table.vue): code pagination

feat(Table): start code paging

feat(frontend): start code frontend

feat(OrderController): finish code backend

feat(OrderController): start code order controller

feat(Specification): start code filter for orders

refactor: code mapstruct mappers

fix: add 'field' prefix to validation annotations

refactor: EmployeeController, MenuItemController

feat(EmployeeController): code and test employee controller

feat!: start migrating from vue js to vue ts

feat: code and test MenuItemController, start code EmployeeController

feat(MenuItemController): create and test 'get all' method

feat(MenuItemController#all): implement request params processing logic

feat: start working on web layer

feat(Categories): add category enum

feat(Specifications): refactor filter