feat: .NET SDK update for version 9.0.0

[ChiragAgg5k]

This PR contains updates to the .NET SDK for version 9.0.0.

[hansi-codes]

🟢 Tier S · Ready to merge

Upgrades the .NET package and SDK metadata to 9.0.0, updates client request/response handling, and adds the new upload behavior. It also adds v9 API surfaces, enums, and models, updates generated services and examples, and records the release changes in the changelog.

1048 of 1140 changed files were too large to include in full.

Verdict	New comments	Fixed	Still open
💬 Commented	0	0	0

Note

Part of the diff was too large to review, so Hansi did not approve.

📂 Walkthrough · 5

File	Change
Appwrite/Appwrite.csproj, Appwrite/Client.cs	Updates package dependencies and version metadata, and adjusts request, response, and upload handling.
Appwrite/Enums/*.cs	Adds and updates enums for the v9 API surface.
Appwrite/Models/*.cs	Adds and updates response models, defaults, nullability, and fields for v9.
Appwrite/Services/*.cs	Updates generated service methods and adds the new API endpoints.
CHANGELOG.md, README.md, docs/examples/*.md	Documents the v9 release and updates SDK examples.

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[hansi-codes]

🟢 Tier S · Looks good to merge. Summary

[ChiragAgg5k]

Superseded: replaced by a passkeys-only minor release.