Chore: Upgrade to Angular v18

Chore: Upgrade to Python 3.12
Chore: Upgrade to psycopg3

bookie/src/app/sales/discount/discount.component.spec.ts

@@ -8,7 +8,7 @@ describe('DiscountComponent', () => {
 
   beforeEach(waitForAsync(() => {
     TestBed.configureTestingModule({
-      declarations: [DiscountComponent],
+      imports: [DiscountComponent],
     }).compileComponents();
   }));
 

bookie/src/app/sales/discount/discount.component.ts

@@ -1,6 +1,30 @@
+import { CdkScrollable } from '@angular/cdk/scrolling';
+import { PercentPipe } from '@angular/common';
 import { Component, Inject } from '@angular/core';
-import { FormArray, FormControl, FormGroup, Validators } from '@angular/forms';
-import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
+import { FormArray, FormControl, FormGroup, Validators, ReactiveFormsModule } from '@angular/forms';
+import { MatButton } from '@angular/material/button';
+import {
+  MAT_DIALOG_DATA,
+  MatDialogRef,
+  MatDialogTitle,
+  MatDialogContent,
+  MatDialogActions,
+  MatDialogClose,
+} from '@angular/material/dialog';
+import { MatFormField, MatSuffix, MatHint } from '@angular/material/form-field';
+import { MatInput } from '@angular/material/input';
+import {
+  MatTable,
+  MatColumnDef,
+  MatHeaderCellDef,
+  MatHeaderCell,
+  MatCellDef,
+  MatCell,
+  MatHeaderRowDef,
+  MatHeaderRow,
+  MatRowDef,
+  MatRow,
+} from '@angular/material/table';
 import { round } from 'mathjs';
 import { Observable } from 'rxjs';
 
@@ -11,6 +35,31 @@ import { DiscountItem } from './discount-item';
   selector: 'app-modifiers',
   templateUrl: './discount.component.html',
   styleUrls: ['./discount.component.css'],
+  standalone: true,
+  imports: [
+    MatDialogTitle,
+    CdkScrollable,
+    MatDialogContent,
+    ReactiveFormsModule,
+    MatTable,
+    MatColumnDef,
+    MatHeaderCellDef,
+    MatHeaderCell,
+    MatCellDef,
+    MatCell,
+    MatFormField,
+    MatInput,
+    MatSuffix,
+    MatHint,
+    MatHeaderRowDef,
+    MatHeaderRow,
+    MatRowDef,
+    MatRow,
+    MatDialogActions,
+    MatButton,
+    MatDialogClose,
+    PercentPipe,
+  ],
 })
 export class DiscountComponent {
   list: DiscountItem[] = [];