docs: update SDK example entrypoint paths

[xingyaoww]

Summary

• Update SDK hooks guide to reference examples/01_standalone_sdk/33_hooks/main.py
• Update remote custom tools guide to reference examples/02_remote_agent_server/06_custom_tool/main.py
• Align docs with examples: standardize directory entrypoints software-agent-sdk#3259 directory example entrypoint renames

Validation

• git diff --check
• Confirmed old example filenames are no longer referenced in the edited docs

This pull request was created by an AI agent (OpenHands) on behalf of the user.

[all-hands-bot]

🟢 Good taste - Clean documentation update aligning with upstream SDK example renames.

[RISK ASSESSMENT]

• [Overall PR] ⚠️ Risk Assessment: 🟢 LOW

Documentation-only changes updating example file paths to match renamed entrypoints in software-agent-sdk. The internal links check has passed, confirming the new paths are valid. No code logic changes, no breaking changes, no security implications.

VERDICT:
✅ Worth merging: Straightforward sync with upstream repository structure.

KEY INSIGHT:
Using main.py as the entry point follows Python conventions and makes examples more discoverable.

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Project	Status	Preview	Updated (UTC)
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