feat: API specs update for version 2.1.x

[appwrite-specifications]

This PR contains API specification updates for version 2.1.x.

[greptile-apps]

Confidence Score: 4/5

The PR appears safe to merge after the non-blocking missing ping example is added or its demo reference is removed.

Summary

This PR introduces the complete Appwrite 2.1.0 OpenAPI contract and generates versioned examples for client, console, and server SDKs.

• Adds a 1,028-operation OpenAPI 3.0 specification.
• Adds 14,157 generated Markdown examples spanning 22 platform directories.
• Includes new database, OAuth2, presence, organization, and vector/document API examples.
• One public cross-platform operation references an example that was not generated.

_{Reviews (1) · Last reviewed commit: "chore: add 2.1.x API specs and SDK examp..."}