pre-work for xdc mainnet and testnet

[gfletcher-cll]

This pull request adds support for the XDC Network (mainnet and testnet) across the codebase, including configuration, provider setup, and utility functions. It also updates reference data to include XDC chain details and removes the 0G-Mainnet chain from the reference list.

XDC Network support:

• Added XDC Network (mainnet and testnet) configuration to chains.json, including chain IDs, titles, explorers, and native currency details.
• Registered XDC chain names in productChainLinks.ts and updated supported types and chain enums in types.ts. [1] [2] [3]
• Added XDC providers to web3Providers.ts for both mainnet and testnet.
• Updated utility functions to handle XDC chain conversions in index.ts. [1] [2]

Reference data updates:

• Added XDC Network and XDC Apothem Network details to chains.json, including RPC endpoints, explorers, and currency info.
• Added ChainLink token symbol mapping for XDC chain IDs in linkNameSymbol.json.
• Removed the 0G-Mainnet entry from the chain reference list.

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Project	Deployment	Preview	Updated (UTC)
documentation	Ready	Preview	Oct 17, 2025 5:05pm

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[github-actions]

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