feat: format posts in markdown

src/fellchensammlung/templates/fellchensammlung/misc/fediverse/an-post.md

@@ -0,0 +1,8 @@
+### {{ adoption_notice.name }}
+
+📍 {{ adoption_notice.location }}
+
+
+{{ adoption_notice.description }}
+
+{{ adoption_notice.get_full_url}}

src/fellchensammlung/tools/fedi.py

@@ -1,5 +1,6 @@
 import logging
 import requests
+from django.template.loader import render_to_string
 
 from fellchensammlung.models import SocialMediaPost, PlatformChoices
 from notfellchen import settings
@@ -81,7 +82,8 @@ class FediClient:
 def post_an_to_fedi(adoption_notice):
     client = FediClient(settings.fediverse_access_token, settings.fediverse_api_base_url)
 
-    status_text = adoption_notice.name
+    context = {"adoption_notice": adoption_notice}
+    status_text = render_to_string("fellchensammlung/misc/fediverse/an-post.md", context)
     images = adoption_notice.get_photos()
 
     if images is not None: