Add config for the Redbelly Testnet chain

[Aastha9018]

PR overview
This PR introduces a new chain definition i.e. redbellyTestnet for chain Redbelly Network Testnet.

Detailed summary

• Added a new chain definition redbellyTestnet for Redbelly Network Testnet
• Defined chain properties such as ID, name, native currency, RPC URLs, block explorers
• Testnet flag is set to true

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PR-Codex overview

This PR adds support for Redbelly Testnet chain.

Detailed summary

• Added redbellyTestnet chain definition
• Defined Redbelly Testnet chain with ID 153
• Added native currency RBNT with symbol RBNT and 18 decimals
• Specified RPC URLs and block explorer details
• Marked the chain as a testnet

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🦋 Changeset detected

Latest commit: e9990c0

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

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