feat: Change async input strategy

[lokitoth]

Remove dependency on aioconsole in favour of using asyncio.to_thread

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 69.40%. Comparing base (95bd514) to head (7f0de67).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../src/autogen_agentchat/agents/_user_proxy_agent.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5060      +/-   ##
==========================================
- Coverage   69.41%   69.40%   -0.02%     
==========================================
  Files         163      163              
  Lines       10495    10494       -1     
==========================================
- Hits         7285     7283       -2     
- Misses       3210     3211       +1     

Flag	Coverage Δ
unittests	69.40% <66.66%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.