ADD LSBLK

[Paol0B]

This pull request introduces a new Rust utility for listing block device information, similar to the lsblk command. The implementation includes a full-featured binary crate setup and a complete device scanning and display logic, integrating with the workspace conventions and using modern Rust libraries.

New utility implementation:

• Added a new binary crate uu_lsblk with its own Cargo.toml, specifying dependencies (uucore, clap), workspace metadata, and binary/lib entry points.
• Implemented the main logic in lsblk.rs to scan /sys/class/block, parse device/partition information, and display a formatted tree of block devices, including mount points and device attributes.
• Provided a simple entry point in main.rs to invoke the utility using the uucore macro.

Command-line interface and device parsing:

• Utilizes clap for argument parsing, supporting an --all flag to show all devices, and reads mount information from /proc/mounts for display.
• Implements recursive device tree building and formatted output, including size formatting and hierarchical display of devices and partitions.

[TheEssem]

This should be implemented in https://github.com/uutils/util-linux.