feat: add tBTC to Mainnet

[johnnyonline]

Please review the following token assets:

📑 Description

• Token Name: tBTC v2
• Project Website: https://www.threshold.network/
• Explorer URI: https://etherscan.io/address/0x18084fbA666a33d37592fA2633fD49a74DD93a88

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✅ Checks

• I created a new folder with the token address (all in lowercase for EVM chains, case sensitive for Solana)
• I added the token's logo as a 32x32 PNG file, named logo-32.png
• I added the token's logo as a 128x128 PNG file, named logo-128.png
• I added the token's logo as a SVG file, named logo.svg
• My SVG logo is a proper SVG and does not contain base64 encoded elements
• My documentation/website clearly display the token address

[vercel]

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[vercel]

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Project	Deployment	Review	Updated (UTC)
token-assets	Ready	Preview, Comment	Jan 7, 2026 7:28pm
token-assets-ui	Ready	Preview, Comment	Jan 7, 2026 7:28pm