docs: add testnet token faucet instructions to deployment guide

[yedeyu]

Description

This PR adds a missing prerequisite step to the "Option 2: Deploy on Testnet" section.

Changes

• Added a new ### Get Testnet Tokens section.
• Clarifies that testnet ZETA is needed for ZetaChain, and specific gas tokens are required to initiate transactions on connected chains (e.g., Base Sepolia).
• Links to the official documentation containing the list of testnet faucets.

Context

Users following the tutorial previously hit the deployment step without instructions on how to fund their wallets, leading to potential transaction failures due to insufficient gas.

Summary by CodeRabbit

• Documentation
  • Added guidance for obtaining testnet tokens, including a faucet link reference, to the deployment tutorial section.

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[vercel]

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[coderabbitai]

📝 Walkthrough

Walkthrough

Documentation update to the "Hello World" tutorial adding a new "Get Testnet Tokens" subsection with guidance and faucet link for obtaining testnet ZETA tokens and gas tokens prior to contract deployment on ZetaChain.

Changes

Cohort / File(s)	Summary
Documentation: Testnet Token Acquisition Guidance src/pages/developers/tutorials/hello.mdx	Added "Get Testnet Tokens" subsection containing token acquisition guidance and faucet link for testnet ZETA and gas tokens. Content inserted before deployment steps to clarify prerequisite token requirements.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Documentation-only changes with no code or logic modifications
• Straightforward content addition without structural impact
• Single file affected with consistent formatting

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the primary change: adding testnet token faucet instructions to a deployment guide document.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📥 Commits

Reviewing files that changed from the base of the PR and between b2b6791 and eb92b6f.

📒 Files selected for processing (1)

• src/pages/developers/tutorials/hello.mdx (1 hunks)

🔇 Additional comments (1)

src/pages/developers/tutorials/hello.mdx (1)

234-245: Clear and well-positioned addition addressing a critical prerequisite.

The new "Get Testnet Tokens" section effectively clarifies that users need gas tokens to transact on testnet networks. The explanation logically precedes the deployment steps and is appropriately placed within the Option 2: Deploy on Testnet workflow. The referenced faucet guide is valid and provides access to multiple testnet faucets as intended.

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