Rename djarea to mizan and fix React casing conventions

Rename the package from djarea to mizan across the entire codebase —
Python package, React library, generators, tests, and examples. Fix
JSX/hook casing (MizanProvider, useMizan, etc.) that broke when the
original PascalCase names were lowercased during the rename.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

django/tests/models.py

@@ -1,4 +1,8 @@
-from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, PermissionsMixin
+from django.contrib.auth.models import (
+    AbstractBaseUser,
+    BaseUserManager,
+    PermissionsMixin,
+)
 from django.db import models
 
 
@@ -23,7 +27,7 @@ class EmailUserManager(BaseUserManager):
 class EmailUser(AbstractBaseUser, PermissionsMixin):
     """Minimal user model with email as USERNAME_FIELD.
 
-    Matches the calling convention used in djarea's test suite:
+    Matches the calling convention used in mizan's test suite:
         User.objects.create_user(email="...", password="...", is_staff=True)
     """
 
@@ -90,7 +94,11 @@ class Book(TimestampMixin):
     is_published = models.BooleanField(default=False)
     author = models.ForeignKey(Author, on_delete=models.CASCADE, related_name="books")
     editor = models.ForeignKey(
-        Author, on_delete=models.SET_NULL, null=True, blank=True, related_name="edited_books",
+        Author,
+        on_delete=models.SET_NULL,
+        null=True,
+        blank=True,
+        related_name="edited_books",
     )
     tags = models.ManyToManyField(Tag, blank=True, related_name="books")
 
@@ -112,7 +120,9 @@ class Chapter(TimestampMixin):
 
 class Section(models.Model):
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
-    chapter = models.ForeignKey(Chapter, on_delete=models.CASCADE, related_name="sections")
+    chapter = models.ForeignKey(
+        Chapter, on_delete=models.CASCADE, related_name="sections"
+    )
     heading = models.CharField(max_length=300)
     body = models.TextField(default="")
     position = models.IntegerField(default=0)