feat: add v5.8.0 package updates

[onesignal-deploy]

Release v5.8.0

🐛 Bug Fixes

• fix: omit include_unsubscribed from requests when unset

📚 Docs

• docs: [SDK-4817] import all models in Python DefaultApi.md examples
• docs: [SDK-4817] render oneOf example as first variant in Python/TS DefaultApi.md
• docs: [SDK-4817] fix date-time example values in Python/TS DefaultApi.md
• docs: [SDK-4800] add AGENTS.md agent entry point to each SDK
• docs: [SDK-4800] fix AGENTS.md Rust import, retry base-delay, absolute README links
• docs: [SDK-4838] show a single canonical call in Python api doc examples
• docs: [SDK-4839] standardize auth placeholders in api doc examples

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Generated from OneSignal/api-client-libraries@1d424a7...947fe4b.

[onesignal-deploy]

Superseded by v5.8.0 release.