feat: Add Twitch Drops Tracker application with campaign management

- Implemented models for DropCampaign, Game, Organization, DropBenefit, TimeBasedDrop, and DropBenefitEdge.
- Created views for listing and detailing drop campaigns.
- Added templates for dashboard, campaign list, and campaign detail.
- Developed management command to import drop campaigns from JSON files.
- Configured admin interface for managing campaigns and related models.
- Updated URL routing for the application.
- Enhanced README with installation instructions and project structure.

twitch/urls.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+from django.urls import path
+
+from twitch import views
+
+app_name = "twitch"
+
+urlpatterns = [
+    path("", views.dashboard, name="dashboard"),
+    path("campaigns/", views.DropCampaignListView.as_view(), name="campaign_list"),
+    path("campaigns/<str:pk>/", views.DropCampaignDetailView.as_view(), name="campaign_detail"),
+]