Feat: Add SDK accept payment snippets

dist/doc/payments/accept-payment/android-complete-payment.js

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+const kt = `import com.paystack.android_sdk.core.Paystack
+import com.paystack.android_sdk.ui.paymentsheet.PaymentSheet
+import com.paystack.android_sdk.ui.paymentsheet.PaymentSheetResult
+
+private lateinit var paymentSheet: PaymentSheet
+
+override fun onCreate(savedInstanceState: Bundle?) {
+  super.onCreate(savedInstanceState)
+  
+  //...
+
+  Paystack.builder()
+          .setPublicKey("pk_{your-public-key}")
+          .build()
+  paymentSheet = PaymentSheet(this, {your-callback-function})
+
+  //...
+}
+
+// example paymentResult function
+private fun paymentComplete(paymentSheetResult: PaymentSheetResult ) {
+  val message = when (paymentSheetResult) {
+    PaymentSheetResult.Cancelled -> "Cancelled"
+    is PaymentSheetResult.Failed -> {
+      Log.e("Something went wrong", paymentSheetResult.error.message.orEmpty(), paymentSheetResult.error)
+      paymentSheetResult.error.message ?: "Failed"
+    }
+
+    is PaymentSheetResult.Completed -> {
+      // Returns the transaction reference  PaymentCompletionDetails(reference={TransactionRef})
+      Log.d("Payment successful", paymentSheetResult.paymentCompletionDetails.toString())
+      "Successful"
+    }
+  }
+
+  Toast.makeText(this, "Payment $message", Toast.LENGTH_SHORT).show()
+}`
+
+const java = `// TODO: Add snippet`
+
+export {kt, java}

dist/doc/payments/accept-payment/ios-complete-payment.js

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+const swift_ui = `import SwiftUI
+import PaystackCore
+import PaystackUI
+
+struct PaymentView: View {
+	let paystack = try? PaystackBuilder
+			.newInstance
+			.setKey("pk_domain_xxxxxxxx")
+			.build()
+
+	var body: some View {
+		VStack(spacing: 8) {
+			Text("Make Payemnt")
+
+			paystack?.chargeUIButton(accessCode: "0peioxfhpn",
+																			onComplete: paymentDone) {
+				Text("Initiate Payment")
+			}
+		}
+		.padding()
+	}
+
+	func paymentDone(_ result: TransactionResult) {
+		// Handle transaction result
+		print(result)
+	}
+}
+
+// ....`
+
+const ui_kit = `import UIKit
+import PaystackCore
+import PaystackUI
+
+class ViewController: UIViewController {
+	let paystack = try? PaystackBuilder
+			.newInstance
+			.setKey("PUBLIC_KEY")
+			.build()
+
+	let paymentAccessCodee = "ACCESS_CODE"
+
+	@IBAction func launchPaymentTapped(_ sender: Any) {
+		paystack?.presentChargeUI(on: self,
+															accessCode: paymentAccessCodee,
+															onComplete: paymentCompleted)
+	}
+
+	func paymentCompleted(_ result: TransactionResult) {
+		print("Payment completed. Result: \(result)")
+	}
+
+}`
+
+export {swift_ui, ui_kit}

src/doc/payments/accept-payment/android-complete-payment/config.yml

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+languages:   
+  - kt
+  - java

src/doc/payments/accept-payment/android-complete-payment/index.java

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+// TODO: Add snippet

src/doc/payments/accept-payment/android-complete-payment/index.kt

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+import com.paystack.android_sdk.core.Paystack
+import com.paystack.android_sdk.ui.paymentsheet.PaymentSheet
+import com.paystack.android_sdk.ui.paymentsheet.PaymentSheetResult
+
+private lateinit var paymentSheet: PaymentSheet
+
+override fun onCreate(savedInstanceState: Bundle?) {
+  super.onCreate(savedInstanceState)
+
+  //...
+
+  Paystack.builder()
+          .setPublicKey("pk_{your-public-key}")
+          .build()
+  paymentSheet = PaymentSheet(this, {your-callback-function})
+
+  //...
+}
+
+// example paymentResult function
+private fun paymentComplete(paymentSheetResult: PaymentSheetResult ) {
+  val message = when (paymentSheetResult) {
+    PaymentSheetResult.Cancelled -> "Cancelled"
+    is PaymentSheetResult.Failed -> {
+      Log.e("Something went wrong", paymentSheetResult.error.message.orEmpty(), paymentSheetResult.error)
+      paymentSheetResult.error.message ?: "Failed"
+    }
+
+    is PaymentSheetResult.Completed -> {
+      // Returns the transaction reference  PaymentCompletionDetails(reference={TransactionRef})
+      Log.d("Payment successful", paymentSheetResult.paymentCompletionDetails.toString())
+      "Successful"
+    }
+  }
+
+  Toast.makeText(this, "Payment $message", Toast.LENGTH_SHORT).show()
+}

src/doc/payments/accept-payment/ios-complete-payment/config.yml

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+type: single-lang
+languages:   
+  - swift

src/doc/payments/accept-payment/ios-complete-payment/swift-ui.swift

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+import SwiftUI
+import PaystackCore
+import PaystackUI
+
+struct PaymentView: View {
+	let paystack = try? PaystackBuilder
+			.newInstance
+			.setKey("pk_domain_xxxxxxxx")
+			.build()
+
+	var body: some View {
+		VStack(spacing: 8) {
+			Text("Make Payemnt")
+
+			paystack?.chargeUIButton(accessCode: "0peioxfhpn",
+																			onComplete: paymentDone) {
+				Text("Initiate Payment")
+			}
+		}
+		.padding()
+	}
+
+	func paymentDone(_ result: TransactionResult) {
+		// Handle transaction result
+		print(result)
+	}
+}
+
+// ....

src/doc/payments/accept-payment/ios-complete-payment/ui-kit.swift

@@ -0,0 +1,23 @@
+import UIKit
+import PaystackCore
+import PaystackUI
+
+class ViewController: UIViewController {
+	let paystack = try? PaystackBuilder
+			.newInstance
+			.setKey("PUBLIC_KEY")
+			.build()
+
+	let paymentAccessCodee = "ACCESS_CODE"
+
+	@IBAction func launchPaymentTapped(_ sender: Any) {
+		paystack?.presentChargeUI(on: self,
+															accessCode: paymentAccessCodee,
+															onComplete: paymentCompleted)
+	}
+
+	func paymentCompleted(_ result: TransactionResult) {
+		print("Payment completed. Result: \(result)")
+	}
+
+}