Add a timeout to the socket in memray attach

[ZeroIntensity]

Issue number of the reported bug or feature request: N/A

Describe your changes
Adds a timeout to memray attach to prevent some rare hangs if the attached Python process crashed or begins finalizing.

Testing performed
Removed this line to simulate the process never attaching.

Additional context
I arbitrarily chose 10 seconds as the timeout. It's probably fine to shorten that, but I don't know how long it usually takes for Memray to connect on slower systems.

cc @godlygeek

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 92.90%. Comparing base (41248ed) to head (4e18dd6).
Report is 168 commits behind head on main.

Files with missing lines	Patch %	Lines
src/memray/commands/attach.py	75.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #753      +/-   ##
==========================================
+ Coverage   92.55%   92.90%   +0.35%     
==========================================
  Files          91       95       +4     
  Lines       11304    11691     +387     
  Branches     1581      407    -1174     
==========================================
+ Hits        10462    10862     +400     
+ Misses        837      829       -8     
+ Partials        5        0       -5     

Flag	Coverage Δ
cpp	92.90% <75.00%> (+6.96%)	⬆️
python_and_cython	92.90% <75.00%> (-2.82%)	⬇️

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