feat: add bind_dir arg to DockerCommandLineExecutor + docs update

[gbrvalerio]

Why are these changes needed?

When the user wants deploy an application to a scenario in which the main app runs in a docker container that executes code using the DockerCommandLineExecutor, only binding the docker.sock is not enough. If the spawned container needs file access from the host, the check that the constructor method of the DockerCommandLineExecutor cli does to work_dir prevents this from happening. Adding a new bind_dir argument solves this without breaking old code and allows for such behavior to be supported.

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[gbrvalerio]

@microsoft-github-policy-service agree

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 50.05%. Comparing base (4a44093) to head (6647298).
Report is 328 commits behind head on main.

Files	Patch %	Lines
autogen/coding/docker_commandline_code_executor.py	50.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2309       +/-   ##
===========================================
+ Coverage   38.14%   50.05%   +11.91%     
===========================================
  Files          78       78               
  Lines        7865     7873        +8     
  Branches     1683     1824      +141     
===========================================
+ Hits         3000     3941      +941     
+ Misses       4615     3600     -1015     
- Partials      250      332       +82     

Flag	Coverage Δ
unittest	14.22% <25.00%> (?)
unittests	49.02% <50.00%> (+10.89%)	⬆️

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