[python] emit typeddicts in a folder /types/ to allow for patching

[l0lawrence]

instead of generating a types.py file on its own can we generate a types/ folder that includes a _patch.py and _types.py like what we do for models/ but with typeddicts

[github-actions]

🎯 Issue Triage

Feature request to have the Python client emitter output TypedDicts into a dedicated /typed/ subfolder, enabling users to patch or override those definitions without conflicts.

Category: Feature Request
Area: emitter:client:python

🔍 Analysis

• This targets the @typespec/http-client-python emitter's code generation output structure.
• Placing TypedDicts under a /typed/ directory would create a stable, well-known location that end users can patch or extend without modifying generated files directly.
• Similar patterns exist in other SDKs for customization/patching support (e.g., _patch.py in Azure SDK for Python).
• No issue body was provided — additional context from the author would help clarify the desired output structure.

📝 Suggested next steps

• Author to provide more detail on the desired folder structure and file naming (e.g., typed/models.py vs typed/_models.py)
• Determine if this should be opt-in (via emitter option) or the default output layout
• Assess impact on existing generated code and whether this would be a breaking change for current consumers

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