Standard Library Tracking Issue

[igaray]

The standard library that concrete offers should also be focused and minimal.
The following modules should be included:

• array: Utilities for the array primitive type.
• boxed: The Box type for heap allocation.
• char: Utilities for the char primitive type.
• clone: The Clone trait for types that cannot be ‘implicitly copied’.
• cmp: Utilities for comparing and ordering values.
• collections: Collection types.
• convert: Traits for conversions between types.
• default: The Default trait for types with a default value.
• env: Inspection and manipulation of the process’s environment.
• error: Interfaces for working with Errors.
• f32: Constants for the f32 single-precision floating point type.
• f64: Constants for the f64 double-precision floating point type.
• ffi: Utilities related to FFI bindings.
• fmt: Utilities for formatting and printing Strings.
• fs: Filesystem manipulation operations.
• hash: Generic hashing support.
• io: Traits, helpers, and type definitions for core I/O functionality.
• iter: Composable external iteration.
• net: Networking primitives for TCP/UDP communication.
• option: Optional values.
• os: OS-specific functionality. Includes working with paths and processes.
• result: Error handling with the Result type.
• string: A UTF-8–encoded, growable string.
• thread: Native threads.
• time: Temporal quantification.
• vec: A contiguous growable array type with heap-allocated contents.