Identify file type by content & allow server to index all text files

- Use Magika's AI for a tiny, portable and better file type
  identification system
- Existing file type identification tools like `file' and `magic'
  require system level packages, that may not be installed by default
  on all operating systems (e.g `file' command on Windows)

pyproject.toml

@@ -46,6 +46,7 @@ dependencies = [
     "openai >= 1.0.0",
     "tiktoken >= 0.3.2",
     "tenacity >= 8.2.2",
+    "magika ~= 0.5.1",
     "pillow ~= 9.5.0",
     "pydantic >= 2.0.0",
     "pyyaml ~= 6.0",