Add Examples to examples folder

examples/initiate_transaction.py

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+from chapa import Chapa
+import random
+import string
+
+def generete_tx_ref(length):
+    #Generate a transaction reference
+    tx_ref = string.ascii_lowercase
+    return ''.join(random.choice(tx_ref) for i in range(length))
+
+
+def checkout():
+	data = {
+		# Required fields
+		'email': 'user@example.com', # customer/client email address
+		'amount': 1311.00, # total payment
+		'first_name': 'Abebe', # customer/client first name
+		'last_name': 'Bikila', # customer/client last name
+		'tx_ref': generete_tx_ref(12),
+
+		# Optional fields
+		'callback_url': 'your_callback_url', # after successful payment chapa will redirect your customer/client to this url
+		'customization': {
+			'title': 'Example.com',
+			'description': 'Payment for your services',
+		}
+	}
+
+	chapa = Chapa('[YOUR_CHAPA_SECRET_KEY]')
+	response = chapa.initialize(**data)
+
+	# After successfull initialization redirect to the `checkout_url`
+	if response['status'] == 'success':
+		# do some action
+		""" Redirect to the checkout page using `response['data']['checkout_url']` """
+	else:
+		# If initialization fails display the error message
+		print(response['message'])

examples/verify_transaction.py

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+from chapa import Chapa
+
+
+def verify(transaction_id):
+	""" Accept the transaction id and verify it """
+	chapa = Chapa('[YOUR_CHAPA_SECRET_KEY]')
+	response = chapa.verify(transaction_id)
+
+	if response['status'] == 'success':
+		# do some actions, probably redirect to success page
+		pass
+	else:
+		# do some actions, probably redirect to failed page
+		pass
+
+	"""
+	If verification response has succeed it looks like
+		{'message': 'Payment details', 'status': 'success', 'data': {
+		'first_name': 'Abebe', 'last_name': 'Bikila', 'email': 'user@example.com', 'currency': 'ETB', 
+		'amount': '1,311.00', 'charge': '45.89', 'mode': 'test', 'method': 'test', 'type': 'API', 
+		'status': 'success', 'reference': '[reference]', 'tx_ref': '[tx_ref]', 
+		'customization': {'title': 'Example.com', 'description': 'Payment for your services', 'logo': None}, 
+		'meta': None, 'created_at': '2022-08-24T12:29:52.000000Z', 'updated_at': '2022-08-24T12:29:52.000000Z'}}
+	"""