Change Business Card size and top padding

[johnchoi96]

A/C:

• [ ] Change card frame size to width: 270 and height: 450
• [ ] Try to center each card on main screen

Note: Use this code as a starter:

VStack {
                    Spacer(minLength: 35)
                    ScrollView(.horizontal) {
                        HStack(spacing: 20) {
                            ForEach(sampleBusinessCards) { card in
                                BusinessCard(cardPayload: card)
                            }
                        }
                        .padding()
                        // "snap" card into view
                        .scrollTargetLayout()
                        .background(Color(uiColor: .cyan))
                    }
                    .scrollIndicators(.hidden)
                    // "snap" card into view
                    .scrollTargetBehavior(.viewAligned)
                    .padding()

                }