test(context): add /context hooks tests for HookExecutor, ContextManager

[hayemaxi]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 91.75627% with 23 lines in your changes missing coverage. Please review.

Project coverage is 14.25%. Comparing base (6363716) to head (49a4d84).

Files with missing lines	Patch %	Lines
crates/q_cli/src/cli/chat/context.rs	78.50%	0 Missing and 23 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1239      +/-   ##
==========================================
+ Coverage   14.05%   14.25%   +0.19%     
==========================================
  Files        2366     2366              
  Lines      205455   205733     +278     
  Branches   185819   186097     +278     
==========================================
+ Hits        28875    29320     +445     
+ Misses     175154   174959     -195     
- Partials     1426     1454      +28     

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