Fix movement issues and improve event handling

[adam4813]

Description

Address jerky movement from server to client, prevent window closing on focus loss, and implement an EventList for better event batching with corresponding tests. Clean up unused variable warnings.

Motivation and Context

At present, when moving, it appears to do a double move or delayed move. This was due to a hack "fix" in the physics system update. The fix was no longer needed

How Has This Been Tested?

Running locally for movement validation

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Attention: Patch coverage is 94.59459% with 2 lines in your changes missing coverage. Please review.

Project coverage is 11.09%. Comparing base (1b0690f) to head (5cdcc81).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
client/resources/vorbis-stream.cpp	0.00%	1 Missing ⚠️
server/save-game.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #254      +/-   ##
==========================================
+ Coverage   10.88%   11.09%   +0.21%     
==========================================
  Files         110      111       +1     
  Lines       13335    13397      +62     
==========================================
+ Hits         1451     1486      +35     
- Misses      11884    11911      +27     

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