Merge branch 'develop'

README.md:
- Add notification about IntelliJ IDE’s warning about div’s align
- Add dummy alt description for image

api.py:
- Add support for /api/topics
- Add support for unified response data validator from utils.py
- Add tokens refresh on config init
- Update FavoriteLinkedType import
- Update all non-optional return types to optional in endpoint method
- Remove redundant `or None if list is empty` description
- Remove check and note about username (not user ID) for create/destroy friend method

endpoints.py:
- Rename topic_updates to updates_topics method
- Update FavoriteLinkedType import

enums/favorite.py:
- Rename LinkedType to FavoriteLinkedType to prevent collision with LinkedType of enums/topic.py

enums/topic.py
- Initial addition

models/topic.py:
- Add optional types for some fields

utils.py:
- Add validate_return_data method for unified validation of response data
- Remove check for True if data is a boolean in query dict generation

README.md

@@ -1,6 +1,7 @@
+<!-- If PyCharm or IDEA will throw a warning here, just ignore it -->
 <div align="center">
     <!-- Not a final logo :( (or not?) -->
-    <img src="https://raw.githubusercontent.com/SecondThundeR/shikithon/main/assets/logo.png">
+    <img src="https://raw.githubusercontent.com/SecondThundeR/shikithon/main/assets/logo.png" alt="Shikithon Logo">
     <h1>Shikithon</h1>
     <p>Очередной враппер для Shikimori API, написанный на Python</p>
 </div>