feat: speed up marshaller and add typing

[bdraco]

This is ~17% speed up marshalling common messages

[codecov]

Codecov Report

Base: 81.19% // Head: 81.19% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (b4612ea) compared to base (d5fb4d9).
Patch coverage: 92.50% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #108   +/-   ##
=======================================
  Coverage   81.19%   81.19%           
=======================================
  Files          26       26           
  Lines        2988     2999   +11     
  Branches      577      582    +5     
=======================================
+ Hits         2426     2435    +9     
- Misses        346      347    +1     
- Partials      216      217    +1     

Impacted Files	Coverage Δ
src/dbus_fast/__version__.py	0.00% <0.00%> (ø)
src/dbus_fast/_private/marshaller.py	96.94% <94.87%> (-1.39%)	⬇️

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