NFT, Batching, Performance & Speed + WebGL Fix

[0xFirekeeper]

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PR-Codex overview

The focus of this PR is to add ConfigureAwait(false) to asynchronous method calls for better performance and responsiveness.

Detailed summary

• Updated Supply property in NFTTypes.cs to accept null values.
• Added ConfigureAwait(false) to asynchronous method calls in various classes for improved responsiveness.
• Modified test assertions in NFTExtension.Tests.cs.
• Added new GetBalance_WithERC20 test in WalletExtension.Tests.cs.
• Implemented ThirdwebRPCTimer class.
• Updated GetBalance extension method in ThirdwebWalletExtensions.cs.
• Added ConfigureAwait(false) to asynchronous methods in various wallet-related classes.

The following files were skipped due to too many changes: Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/AWS.cs, Thirdweb/Thirdweb.Storage/ThirdwebStorage.cs, Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.EmailOTP.cs, Thirdweb/Thirdweb.Contracts/ThirdwebContract.cs, Thirdweb/Thirdweb.RPC/ThirdwebRPC.cs, Thirdweb/Thirdweb.NFT/ThirdwebNFTExtensions.cs, Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet/EmbeddedWallet.Misc.cs, Thirdweb/Thirdweb.Transactions/ThirdwebTransaction.cs, Thirdweb/Thirdweb.Contracts/ThirdwebContractExtensions.cs, Thirdweb/Thirdweb.Wallets/InAppWallet/EmbeddedWallet.Authentication/Server.cs

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