Description

This PR merges the feat/migrate-sphinx-to-mkdocs feature branch into develop, completing the migration from the existing Sphinx documentation system to Material for Mkdocs

Related PRs in feat/migrate-sphinx-to-mkdocs:

• Update clients to support Google-style docstrings. #24
• Generate top-level and individual API reference docs for all SDK clients #36

In addition to the documentation migration, this PR:

• Rebases the feature branch onto the latest develop
• Regenerates all clients using the latest service models and code generator updates from Switch to Google-style docstrings with Markdown and remove Sphinx/RST generation smithy-lang/smithy-python#592
• Fixes minor logging inconsistencies and removes leftover files from rebase

This PR and the related code generator update will be merged simultaneously.

Testing

• Ran integration tests and confirmed they succeed for Transcribe Streaming and Bedrock Runtime.
• Confirmed documentation generates for top-level site and for individual clients.

How to Generate Docs

For top-level client docs, execute these commands in the root level of this repo. For individual client documentation, execute these commands in each client's directory.

# Install docs dependencies
make docs-install

# Build static HTML to site/
make docs

# Serve documentation locally to port 8000
make docs-serve

# Clean up artifacts
make docs-clean

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