feat: improve asyncio write performance

[bdraco]

Similar to https://github.com/python/cpython/blob/2a50772b63d7bc4ef97d16e9bcc53455c301b0ea/Lib/asyncio/selector_events.py?rgh-link-date=2022-09-24T02%3A51%3A37Z#L914

With this change ~99% of writes don't need to be scheduled and can happen right away so it helps quite a bit with the latency

I was able to get sub 1s connection times on my yale locks with this change

2022-09-23 21:25:16.427 DEBUG (MainThread) [bleak_retry_connector] Family Room Door (M1028EZ) - /org/bluez/hci3/dev_78_9C_85_08_D2_CE: Connecting (attempt: 1, last rssi: -76)
2022-09-23 21:25:16.727 DEBUG (MainThread) [bleak_retry_connector] Family Room Door (M1028EZ) - /org/bluez/hci3/dev_78_9C_85_08_D2_CE: Connected (attempt: 1, last rssi: -76)

Previously the best I could do was slightly > 1s

fixes #28

[codecov]

Codecov Report

Base: 81.23% // Head: 81.01% // Decreases project coverage by -0.22% ⚠️

Coverage data is based on head (22f578f) compared to base (0bce72a).
Patch coverage: 80.00% of modified lines in pull request are covered.

❗ Current head 22f578f differs from pull request most recent head 04c12f7. Consider uploading reports for the commit 04c12f7 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
- Coverage   81.23%   81.01%   -0.23%     
==========================================
  Files          24       24              
  Lines        2840     2849       +9     
  Branches      619      623       +4     
==========================================
+ Hits         2307     2308       +1     
- Misses        327      330       +3     
- Partials      206      211       +5     

Impacted Files	Coverage Δ
src/dbus_fast/message_bus.py	72.31% <50.00%> (-1.60%)	⬇️
src/dbus_fast/aio/message_bus.py	87.21% <90.90%> (-0.05%)	⬇️
src/dbus_fast/proxy_object.py	76.19% <0.00%> (-2.05%)	⬇️
src/dbus_fast/glib/message_bus.py	82.62% <0.00%> (+2.11%)	⬆️

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[bdraco]

I don't think we can get rid of add_writer/remove_writer because its needed for unexpected disconnects.

However with this change ~99% of writes don't need to be scheduled and can happen right away so it helps quite a bit with the latency