add messages when creating and copying files

Author: Faruk

copier.yml

@@ -60,3 +60,34 @@ repository_url:
 
 
 # Optional questions
+
+
+# user messages
+
+_message_after_copy: |
+    Your project "{{ package_name }}" has been created successfully!
+
+    Next steps:
+
+    1. Change directory to the project root:
+
+       $ cd {{ _copier_conf.dst_path }}
+
+    2. Read ("{{ package_name }}"/next_steps.md) which contains information on next steps.
+
+_message_after_update: |
+    Your project "{{ package_name }}" has been updated successfully!
+    In case there are any conflicts, please resolve them. Then,
+    you're done.
+
+_message_before_copy: |
+    Thanks for generating a project using our template.
+
+    You'll be asked a series of questions whose answers will be used to
+    generate a tailored project for you.
+
+_message_before_update: |
+    Thanks for updating your project using our template.
+
+    You'll be asked a series of questions whose answers are pre-populated
+    with previously entered values. Feel free to change them as needed.