Feature: Tax Regimes are added so that different bills with different series can be printed for Different regimes such as VAT and GST

Chore: Model relationships updated to make them simpler
Chore: Bill printing majorly refactored for it

Due to the sheer depth of the changes. There can be showstoppers. Please test it carefully

bookie/src/app/regimes/regimes.module.ts

@@ -0,0 +1,31 @@
+import { CdkTableModule } from '@angular/cdk/table';
+import { CommonModule } from '@angular/common';
+import { NgModule } from '@angular/core';
+import { ReactiveFormsModule } from '@angular/forms';
+import { MatButtonModule } from '@angular/material/button';
+import { MatCardModule } from '@angular/material/card';
+import { MatIconModule } from '@angular/material/icon';
+import { MatInputModule } from '@angular/material/input';
+import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
+import { MatTableModule } from '@angular/material/table';
+
+import { RegimeDetailComponent } from './regime-detail/regime-detail.component';
+import { RegimeListComponent } from './regime-list/regime-list.component';
+import { RegimesRoutingModule } from './regimes-routing.module';
+
+@NgModule({
+  imports: [
+    CommonModule,
+    CdkTableModule,
+    MatButtonModule,
+    MatCardModule,
+    MatIconModule,
+    MatInputModule,
+    MatProgressSpinnerModule,
+    MatTableModule,
+    ReactiveFormsModule,
+    RegimesRoutingModule,
+  ],
+  declarations: [RegimeListComponent, RegimeDetailComponent],
+})
+export class RegimesModule {}