Add bolt11 parser and Invoice View

Changelog-Added: Display bolt11 invoice widgets on posts

damus/Components/InvoicesView.swift

@@ -0,0 +1,35 @@
+//
+//  InvoicesView.swift
+//  damus
+//
+//  Created by William Casarin on 2022-10-18.
+//
+
+import SwiftUI
+
+struct InvoicesView: View {
+    var invoices: [Invoice]
+    
+    @State var open_sheet: Bool = false
+    @State var current_invoice: Invoice? = nil
+    
+    var body: some View {
+        TabView {
+            ForEach(invoices, id: \.string) { invoice in
+                InvoiceView(invoice: invoice)
+                .tabItem {
+                    Text(invoice.string)
+                }
+                .id(invoice.string)
+            }
+        }
+        .frame(height: 200)
+        .tabViewStyle(PageTabViewStyle())
+    }
+}
+
+struct InvoicesView_Previews: PreviewProvider {
+    static var previews: some View {
+        InvoicesView(invoices: [Invoice.init(description: "description", amount: 10000, string: "invstr", expiry: 100000, payment_hash: Data(), created_at: 1000000)])
+    }
+}