This pull request fix two Issues related to the Parser blocking the event loop

1. Replaces the usage of requests.get() inside the shares parsers with httpx, so there is no longer any blocking i/o inside the event loop (with requests to ShareList.php taking upwards of 5 minutes this caused websocket and mqtt to disconnect as seen in False positive connectivity #9 and The connection connects but than after a minute disconnects #7 )
2. moves parser calls into their own async task to prevent blocking the websocket receive loop