Add importprivkeys RPC

The Core Wallet Migration Tools have been enhanced to support a broader range of address types through the new combo-import feature, as outlined in the original proposal titled "Add importprivkeys RPC," available for review here. This update aims to bolster the functionality and flexibility of the tools, facilitating a more comprehensive approach to wallet management. The tools themselves can be accessed here.

Additionally, the release of the Core Wallet Maintenance Tools marks a significant advancement in wallet management technology, specifically tailored for both Bitcoin and Namecoin. Among the various features of these tools is a script dedicated to extracting private keys from descriptors. Originally developed for Namecoin, this tool has now been made publicly available due to popular demand, as indicated on this GitHub issue. For those interested, the tools are hosted on GitHub here.

These developments reflect ongoing efforts to enhance cryptocurrency wallet infrastructure by providing robust tools that support efficient management and maintenance of digital assets across different cryptocurrencies.