added import and export of wiki content

tinywiki/models.py

@@ -60,7 +60,6 @@ class Page(models.Model):
                                null=False,
                                blank=False)
 
-
     created_at = models.DateTimeField(_("created at"),
                                       auto_now_add=True)
     created_by = models.ForeignKey(get_user_model(),
@@ -80,6 +79,7 @@ class Page(models.Model):
     @property
     def content_type(self)->WikiContentType:
         return WikiContentType.from_string(self.content_type_data)
+
     @content_type.setter
     def content_type(self, content_type: str | WikiContentType):
         if isinstance(content_type, str):
@@ -92,6 +92,7 @@ class Page(models.Model):
     @property
     def status(self)->WikiPageStatus:
         return WikiPageStatus.from_string(self.status_data)
+
     @status.setter
     def status(self, status: str | WikiPageStatus):
         if isinstance(status, str):
@@ -215,3 +216,19 @@ class SidebarEntry(models.Model):
             return mark_safe(f"<li class=\"sidebar-item\">{self.widget}</li>")
         else:
             return mark_safe(f"<li class=\"sidebar-item\">{self.link}</li>")
+
+
+class BuiltinPages(models.Model):
+    app = models.CharField(_("app"),
+                           max_length=255,
+                           unique=True)
+    version = models.PositiveIntegerField(_("version"))
+    prefix = models.CharField(_("prefix"))
+
+
+class BuiltinImages(models.Model):
+    app = models.CharField(_("app"),
+                           max_length=255,
+                           unique=True)
+    version = models.PositiveIntegerField(_("version"))
+    prefix = models.CharField(_("prefix"))