Python: restructure: Python samples into progressive 01-05 layout (#3862)

* restructure: Python samples into progressive 01-05 layout

- 01-get-started/: 6 numbered steps (hello agent → hosting)
- 02-agents/: all agent concept samples (tools, middleware, providers, etc.)
- 03-workflows/: ALL existing workflow samples preserved as-is
- 04-hosting/: azure-functions, durabletask, a2a
- 05-end-to-end/: demos, evaluation, hosted agents
- Old files moved to _to_delete/ for review
- Added AGENTS.md with structure documentation
- autogen-migration/ and semantic-kernel-migration/ preserved at root

* fix: switch to AzureOpenAI Foundry, fix CI failures

- Switch all 01-get-started samples to AzureOpenAIResponsesClient with
  Azure AI Foundry project endpoint (AZURE_AI_PROJECT_ENDPOINT +
  AZURE_OPENAI_RESPONSES_DEPLOYMENT_NAME + AzureCliCredential)
- Add _to_delete/ and 05-end-to-end/ to pyrightconfig.samples.json excludes
- Fix test paths in packages/ that referenced old getting_started/ dirs:
  durabletask conftest + streaming test, azurefunctions conftest,
  devui conftest + capture_messages + openai_sdk_integration
- Fix workflow_as_agent_human_in_the_loop.py import (sibling import)
- Update hosting READMEs and tool comment paths
- Replace root README.md with new structure overview
- Update AGENTS.md to document Azure OpenAI Foundry as default provider

* cleanup: remove _to_delete folder, copy resource files to active dirs

All files in _to_delete/ were either:
- Exact duplicates of files in the new structure (240 files)
- Same file with only comment path updates (100 files)
- One import-fix diff (workflow_as_agent_human_in_the_loop.py)
- One superseded minimal_sample.py

Resource files (sample.pdf, countries.json, employees.pdf, weather.json)
copied to 02-agents/sample_assets/ and 02-agents/resources/ since active
samples reference them.

* fix: address PR review comments, centralize resources, remove root duplicates

- Fix type annotation in 04_memory.py (string union -> proper types)
- Fix old sample paths in observability files
- Fix grammar/spelling in observability samples
- Move sample_assets/ and resources/ to shared/ folder
- Remove 8 duplicate observability files from 02-agents root
- Update resource path references in multimodal_input and provider samples

* fix: update broken links from old getting_started paths to new structure

- Update relative paths in READMEs: getting_started/ → 01-get-started/,
  02-agents/, 03-workflows/, 04-hosting/, 05-end-to-end/
- Fix absolute GitHub URLs in package READMEs
- Fix broken link in ollama package README

* fix: convert absolute GitHub URLs to relative paths for link checker

Absolute URLs to python/samples/ on main branch 404 until PR merges.
Converted to relative paths that linkspector can verify locally.

* fix: update link for handoff sample moved to orchestrations/

* fix: update chatkit-integration README path from demos/ to 05-end-to-end/

* fix: update broken links in orchestrations README to match flat directory structure

python/packages/devui/README.md

@@ -373,7 +373,7 @@ This restricts developer APIs (reload, deployment, entity details) and requires
 
 ## Examples
 
-See working implementations in `python/samples/getting_started/devui/`
+See working implementations in `python/samples/02-agents/devui/`
 
 ## License
 

python/packages/devui/dev.md

@@ -45,7 +45,7 @@ AZURE_OPENAI_CHAT_DEPLOYMENT_NAME="your-deployment-name"
 **Option A: In-Memory Mode (Recommended for quick testing)**
 
 ```bash
-cd samples/getting_started/devui
+cd samples/02-agents/devui
 python in_memory_mode.py
 ```
 
@@ -54,7 +54,7 @@ This runs a simple example with predefined agents and opens your browser automat
 **Option B: Directory-Based Discovery**
 
 ```bash
-cd samples/getting_started/devui
+cd samples/02-agents/devui
 devui
 ```
 

python/packages/devui/samples/README.md

@@ -7,7 +7,7 @@
 All DevUI samples are now located at:
 
 ```
-python/samples/getting_started/devui/
+python/samples/02-agents/devui/
 ```
 
 ## Available Samples
@@ -22,17 +22,17 @@ python/samples/getting_started/devui/
 ## Quick Start
 
 ```bash
-cd ../../samples/getting_started/devui
+cd ../../samples/02-agents/devui
 python in_memory_mode.py
 ```
 
 Or for directory discovery:
 
 ```bash
-cd ../../samples/getting_started/devui
+cd ../../samples/02-agents/devui
 devui
 ```
 
 ## Learn More
 
-See the [DevUI samples README](../../../samples/getting_started/devui/README.md) for detailed documentation.
+See the [DevUI samples README](../../../samples/02-agents/devui/README.md) for detailed documentation.

python/packages/devui/tests/devui/capture_messages.py

@@ -28,8 +28,8 @@ def start_server() -> tuple[str, Any]:
     """Start server with samples directory."""
     # Get samples directory - updated path after samples were moved
     current_dir = Path(__file__).parent
-    # Samples are now in python/samples/getting_started/devui
-    samples_dir = current_dir.parent.parent.parent / "samples" / "getting_started" / "devui"
+    # Samples are now in python/samples/02-agents/devui
+    samples_dir = current_dir.parent.parent.parent / "samples" / "02-agents" / "devui"
 
     if not samples_dir.exists():
         raise RuntimeError(f"Samples directory not found: {samples_dir}")

python/packages/devui/tests/devui/conftest.py

@@ -413,8 +413,8 @@ def executor_failed_event() -> WorkflowEvent[WorkflowErrorDetails]:
 def test_entities_dir() -> str:
     """Use the samples directory which has proper entity structure."""
     current_dir = Path(__file__).parent
-    # Navigate to python/samples/getting_started/devui
-    samples_dir = current_dir.parent.parent.parent.parent / "samples" / "getting_started" / "devui"
+    # Navigate to python/samples/02-agents/devui
+    samples_dir = current_dir.parent.parent.parent.parent / "samples" / "02-agents" / "devui"
     return str(samples_dir.resolve())
 
 

python/packages/devui/tests/devui/test_openai_sdk_integration.py

@@ -28,7 +28,7 @@ def devui_server() -> Generator[str, None, None]:
     """
     # Get samples directory
     current_dir = Path(__file__).parent
-    samples_dir = current_dir.parent.parent.parent / "samples" / "getting_started" / "devui"
+    samples_dir = current_dir.parent.parent.parent / "samples" / "02-agents" / "devui"
 
     if not samples_dir.exists():
         pytest.skip(f"Samples directory not found: {samples_dir}")