Offload `ark-cli storage` Subcommand Methods to `fs-storage` Crate

[tareknaser]

Description

Currently, ark-cli storage subcommand implements its own storage handling methods for different storage types, specifically:

• File
• Folder

For each storage type, ark-cli includes methods to:

• Load storage from disk
• Read storage
• Append to storage
• Overwrite storage

ark-cli exposes CLI commands to call these methods from the command line.

For better modularity, we should offload these operations to another crate within ark-rust workspace, potentially fs-storage.
ark-cli crate should then only have CLI command structs to gather parameters from the user, perform minimal preprocessing (if needed), and pass these to the methods in fs-storage. This will allow better separation of concerns, making the codebase easier to manage and extend.

Tasks

• Implement the storage handling methods (loading, reading, appending, overwriting) in fs-storage crate.
• Modify the ark-cli crate to use the fs-storage crate for all storage operations.

Related conversation: #67 (comment)