Python: Move samples to durable directory

[Copilot]

Motivation and Context

Reorganizes Python durable agent samples to match the .NET structure introduced in #3471. Consolidates Azure Functions and console app samples under a unified durable/ directory for better discoverability and maintainability.

Description

Directory Structure Changes:

• Moved python/samples/getting_started/durabletask/ → python/samples/durable/console_apps/
• Moved python/samples/getting_started/azure_functions/ → python/samples/durable/azure_functions/

Documentation Updates:

• Created python/samples/durable/README.md with overview of durable hosting patterns
• Updated python/samples/README.md to consolidate Azure Functions and Console Apps sections under unified Durable section
• Updated all sample-level README files to reflect new paths

Integration Test Updates:

• Updated python/packages/durabletask/tests/integration_tests/conftest.py to reference new sample paths
• Updated python/packages/durabletask/tests/integration_tests/test_03_dt_single_agent_streaming.py to reference new sample paths
• Updated python/packages/azurefunctions/tests/integration_tests/testutils.py to reference new sample paths

Result:

python/samples/durable/
├── console_apps/          # Durable Task Scheduler samples (worker-client pattern)
│   ├── 01_single_agent/
│   ├── 02_multi_agent/
│   └── ...
└── azure_functions/       # Azure Functions with Durable Extension samples
    ├── 01_single_agent/
    ├── 02_multi_agent/
    └── ...

All imports, file paths, code references, and integration test paths verified functional. No breaking changes to sample functionality or test infrastructure.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Python: Move samples to durable directory</issue_title>
<issue_description>Similar as #3471 for Python</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Python: Move samples to durable directory #3557

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[larohra]

@copilot the integration tests for both azurefunctions and durabletask package rely on the samples path to run. Can you update those too to match the new directory structure?

[Copilot]

@copilot the integration tests for both azurefunctions and durabletask package rely on the samples path to run. Can you update those too to match the new directory structure?

Updated the integration test paths in commit 2a5186c. The following files have been fixed:

• python/packages/durabletask/tests/integration_tests/conftest.py - now uses samples/durable/console_apps
• python/packages/durabletask/tests/integration_tests/test_03_dt_single_agent_streaming.py - now uses samples/durable/console_apps
• python/packages/azurefunctions/tests/integration_tests/testutils.py - now uses samples/durable/azure_functions