Add TALNTnet mainnet and testnet chains

[jevonearth]

This PR adds chain configuration for TALNTnet Mainnet and Testnet, which are AppChain solutions built on Base.

About TALNTnet

TALNTnet is a optimism stack based AppChain that settles to Base mainnet Base. The chain will support the https://decentralized.pictures/ film and arts funding platform which has been in operation for several years, and is now in the process of migrating to this new Base AppChain.

Chains Added

• TALNTnet Mainnet (chainId: 845300011)
• TALNTnet Testnet (chainId: 8453200011)

Verification

• Both chains have been validated with the schema checker and pass all validation
• The IPFS CID for the icon (bafkreiedq7yiupuremffyx7oznqq5j52jxl2qfcqxwdapvjequ54gu2ayy) is publicly accessible
• Parent chains have been correctly referenced (Base Mainnet and Base Sepolia)
• All fields comply with the repository's requirements

Additional Information

• Website: https://www.talnt.net/ (Will be live very soon!)

Thank you for considering this PR!

[github-actions]

You successfully submitted a PR! Due to the amount of PRs coming in: we will only look at PRs that the CI is happy with. We can also not hold your hand getting the CI green - just look how others that where merged did it and RTFM. So as long as there is any CI check that reports an error - no human will look at this. You might be able to ask for some support after supporting the project - e.g. by sending funds to lists.eth. When you fixed things after a requested change - then you also need to (re-)request a review.