Add hedera network to supported networks list

[jaycoolslm]

Description

Add hedera network to supported networks list in cursor mdc file to reduce hallucinations and affirm to AI Agent that Hedera is supported.

Tests

• - Ran the changes locally with Mintlify and confirmed that the changes appear as expected.
• - Ran a grammar check on the updated/created content using ChatGPT.

[Copilot]

Pull Request Overview

This PR adds Hedera network to the supported networks list in the Reown AppKit documentation to reduce AI hallucinations and confirm Hedera's support status.

• Updated import example to include hedera network alongside existing supported networks

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