feat(calendar): add admin page

apps/calendar/admin.py

@@ -1,3 +1,37 @@
 from django.contrib import admin
 
-# Register your models here.
+from ara.classes.admin import MetaDataModelAdmin
+
+from .models import Event, Tag
+
+
+@admin.register(Event)
+class EventAdmin(MetaDataModelAdmin):
+    list_display = (
+        "ko_title",
+        "en_title",
+        "is_all_day",
+        "start_at",
+        "end_at",
+        "location",
+        "url",
+    )
+    fields = (
+        ("ko_title", "ko_description"),
+        ("en_title", "en_description"),
+        ("start_at", "end_at"),
+        "is_all_day",
+        "location",
+        "url",
+        "tags",
+    )
+    filter_horizontal = ("tags",)
+
+
+@admin.register(Tag)
+class TagAdmin(admin.ModelAdmin):
+    list_display = (
+        "colored_ko_name",
+        "en_name",
+        "color",
+    )