feat: SDK update for version 28.1.0

[ChiragAgg5k]

This PR contains updates to the SDK for version 28.1.0.

What's Changed

• Added: optional state parameter on createOAuth2Token, returned unchanged on the success and failure URLs

This is a patch on top of the previous stable release: it adds only the state parameter from appwrite/appwrite#14157, plus the version bump and changelog. Generated by diffing the sdk-generator output for the specs before and after #14157.

[hansi-codes]

🟢 Tier S · Ready to merge

The new parameter follows the existing request-encoding path, preserves existing callers, and introduces no identified defects.

Adds an optional state keyword to create_o_auth2_token and forwards it in the OAuth2 request. Updates the example and changelog, and bumps the gem and SDK header versions to 28.1.0.

Verdict	New comments	Fixed	Still open
✅ Approved	0	0	0

📂 Walkthrough · 5

File	Change
CHANGELOG.md	Documents the optional OAuth2 state parameter in the 28.1.0 release.
appwrite.gemspec	Bumps the gem version to 28.1.0.
docs/examples/account/create-o-auth-2-token.md	Shows how to supply the optional state keyword.
lib/appwrite/client.rb	Updates the SDK version header to 28.1.0.
lib/appwrite/services/account.rb	Documents, accepts, and forwards the optional OAuth2 state parameter.

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[hansi-codes]

🟢 Tier S · Looks good to merge. Summary