feat: Nexora grouped action menu for Current Account, FD, and RD views

- Non-individual clients: hide Nomination Facility & Nominees in create flow,
  skip nominee validation on submit, hide Nominees tab in account view
- Current Account view: replace flat kebab menu with Nexora grouped menu
  (Transact / Restrict / Interest / Admin / Danger zone), scrollable body,
  pinned header, colour-coded icons; add kindOf/iconOf/hasKind helpers
- Fixed Deposit view: same grouped menu using shared cur-action-menu styles
- Recurring Deposit view: same grouped menu with permission directives
- main.scss: add cur-action-menu / cur-menu global styles with MDC flex fix
  for Material 20 (.mat-mdc-menu-item-text)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/current-accounts/create-current-account/create-current-account.component.html

@@ -60,6 +60,7 @@
           <mifosx-current-account-currency-step
             [currentAccountProductTemplate]="currentAccountProductTemplate"
             [primaryClientId]="currentAccountTemplate?.clientId ?? null"
+            [isNonIndividualClient]="currentAccountDetailsStep.isNonIndividualClient"
           ></mifosx-current-account-currency-step>
         }