Add Confidential tab

[ericglau]

Adds a Confidential tab that implements a confidential fungible token, using OpenZeppelin Confidential Contracts.

Includes:

• @openzeppelin/wizard-confidential package, UI, AI assistant, MCP tools.

[ericglau]

@SocketSecurity ignore-all
These are AI detected anomalies and look like false positives.

[ericglau]

security review from MCP unittest

• UnvalidatedNetworkConfig: fixed
• PreReleaseFHEDependencies: this is the current state of the supported upstream dependencies. Will be improved when they are supported in newer versions of Confidential Contracts.
• printContractVersioned: fixed
• injectHyperlinks, evaluateSelection: unnecessary, since any issues should be quite apparent in the UI

[ericglau]

Notes on recent updates:

• Support Confidential Contracts v0.3.0: Renamed all API and UIs to ERC7984, changed tokenURI to contractURI
• Confidential Contracts v0.3.0 has a peer dependency on @fhevm/solidity@0.9.1, but the NPM package for @fhevm/solidity@0.9.1 appears to correspond to GitHub tag v0.9.14. So we’ll use that NPM package, but will map import links in the UI to point users to v0.9.14.
• SepoliaConfig and EthereumConfig have been combined into ZamaEthereumConfig. So the UI will only show 1 option under Network Configuration as “Zama Ethereum”, which is applicable to Ethereum mainnet and Sepolia.