Add linting rules

[davorrunje]

Why are these changes needed?

Related issue number

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• I've included any doc changes needed for https://docs.ag2.ai/. See https://docs.ag2.ai/docs/contributor-guide/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.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 2.91262% with 100 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
autogen/oai/ollama.py	0.00%	13 Missing ⚠️
autogen/agentchat/groupchat.py	0.00%	7 Missing ⚠️
autogen/agentchat/conversable_agent.py	0.00%	6 Missing ⚠️
autogen/oai/client.py	0.00%	6 Missing ⚠️
autogen/agentchat/contrib/society_of_mind_agent.py	0.00%	5 Missing ⚠️
...togen/agentchat/contrib/capabilities/transforms.py	0.00%	4 Missing ⚠️
autogen/agentchat/contrib/vectordb/chromadb.py	0.00%	4 Missing ⚠️
autogen/oai/completion.py	0.00%	4 Missing ⚠️
...en/agentchat/contrib/captainagent/agent_builder.py	0.00%	3 Missing ⚠️
autogen/agentchat/contrib/swarm_agent.py	0.00%	3 Missing ⚠️
... and 30 more

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Flag	Coverage Δ
unittests	15.50% <2.91%> (?)

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Files with missing lines	Coverage Δ
...agentchat/contrib/capabilities/tools_capability.py	0.00% <ø> (ø)
autogen/coding/jupyter/import_utils.py	0.00% <ø> (ø)
autogen/exception_utils.py	56.00% <ø> (ø)
autogen/import_utils.py	75.30% <100.00%> (ø)
autogen/oai/anthropic.py	49.22% <100.00%> (ø)
autogen/tools/dependency_injection.py	39.74% <ø> (ø)
autogen/tools/tool.py	46.00% <ø> (ø)
...gen/agentchat/contrib/capabilities/teachability.py	0.00% <0.00%> (ø)
...gen/agentchat/contrib/captainagent/captainagent.py	0.00% <0.00%> (ø)
autogen/agentchat/contrib/rag/document_utils.py	0.00% <0.00%> (ø)
... and 37 more