style: enforce consistent codestyle via ruff config and auto-fixes

- Configure ruff: isort, pyupgrade, bugbear, flake8 rules
- Auto-fix import sorting, redundant parens, exception chaining
- Remove from __future__ import annotations (Python 3.13+)
- Convert debug print() to logger calls
- Fix typo applicaiton → application in icon_resolver
- Remove bare returns in animator setters
- Move TYPE_CHECKING imports to runtime where used at runtime

src/services/network.py

@@ -254,7 +254,7 @@ class Ethernet(Service):
         ):
             self._device.connect(f"notify::{pn}", lambda *_: self.notifier(pn))
 
-        self._device.connect("notify::speed", lambda *_: print(_))
+        self._device.connect("notify::speed", lambda *_: self.notifier("speed"))
 
     def notifier(self, pn):
         self.notify(pn)