feat: support User settings in FS

[zccz14]

It is crucial that we store the user's settings in the FileSystem to ensure the safety and accessibility of their data.

By doing so, we can easily sync the settings using OneDrive or any other similar tools.

Currently, we are storing some settings in IndexedDB, which unfortunately can be cleaned for various reasons, resulting in the loss of important data.

That's why it's essential to store certain settings, such as the "host config," in the FileSystem, as it provides a more reliable and secure option for storing and accessing user data.