Switch to a timer-based approach for Firefox handling

[dalyIsaac]

After switching the logger to a less verbose option, it turns out that the FirefoxWindowProcessor wouldn't work reliably. I think two things were occurring here:

1. No EVENT_OBJECT_CLOAKED event was being sent sometimes, causing Whim to ignore events to the Firefox window.
2. The Firefox window wouldn't respect Whim's SetWindowPos calls due to Firefox's window startup logic.

The following changes have been made, respectively:

1. The FirefoxWindowProcessor now listens to all events after a timeout of 5 seconds. This is unpleasant, but seems necessary to handle the case when EVENT_OBJECT_CLOAKED was not emitted.
2. Ignored events can now trigger layouts. This necessitated a change to the WindowProcessorManager.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.06%. Comparing base (5432198) to head (31886a2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #960   +/-   ##
=======================================
  Coverage   81.06%   81.06%           
=======================================
  Files         274      274           
  Lines       11523    11534   +11     
  Branches     1293     1294    +1     
=======================================
+ Hits         9341     9350    +9     
- Misses       2008     2009    +1     
- Partials      174      175    +1     

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