Migrate AI integration samples to standalone packages

[brianstrauch]

Switch the Strands Agents, Deep Agents, Google ADK, Google GenAI, LangGraph, and LangSmith samples and their tests to standalone Temporal integration packages and import namespaces. This includes the Bedrock AgentCore project; OpenAI Agents already uses its standalone package.

Require Temporal 1.34 or later, install the Google integrations' MCP extras, refresh both affected lockfiles, and update setup instructions and documentation links. Relax the encryption sample's old cryptography<39 constraint so the new Google authentication dependencies can resolve on Python 3.14.

Validation:

• AI integration tests: 51 passed on Python 3.14; 33 passed and 8 skipped on Python 3.10. Deep Agents remains limited to Python 3.11 or later.
• Root Ruff checks and formatting passed; mypy passed for all 824 source files on Python 3.10 and 3.14.
• AgentCore Ruff, mypy, and its test passed.
• Encryption round trips passed on both Python versions; passthrough, key validation, and tamper detection passed on Python 3.14.
• Strands imports succeeded in the workspace and AgentCore environments; targeted Pyright checks reported zero errors.

[DABH]

Obviously didn't look carefully at each sample but as far as the top-level changes like imports and package names and config things look good