Add documentation and source

Added documentation, source and extra files.

source/orm/library/models/author.py

@@ -0,0 +1,28 @@
+from datetime import date
+from uuid import uuid4
+
+from django.db import models
+
+
+class Author(models.Model):
+    """
+    Model for book authors.
+
+    """
+
+    uuid = models.UUIDField(default=uuid4, db_index=True, verbose_name="UUID")
+    first_name = models.CharField(max_length=64, blank=False, verbose_name="first name")
+    last_name = models.CharField(max_length=64, blank=False, verbose_name="last name")
+    description = models.TextField(blank=True, verbose_name="description")
+    birth_date = models.DateField(default=date(2000, 1, 1), verbose_name="birth date")
+    registration_date = models.DateTimeField(auto_now_add=True, verbose_name="registration date")
+
+    class Meta:
+        verbose_name = "book author"
+        verbose_name_plural = "book authors"
+
+    def __str__(self):
+        return f"{self.get_full_name()} ({self.uuid})"
+
+    def get_full_name(self):
+        return f"{self.first_name} {self.last_name}"