Consider moving away from using workspaces

[bitzoic]

Motivation

Description

Issue

The sway-libs repository currently uses workspaces to organize each library. This separates each library into its own project and allows for each library to be imported using only the library name. This does however comes with a major downside, being that each library must be imported individually.

For example, here we would like to use 3 different libraries; StorageString, String, and Ownership. Adding these as dependencies would look like the following:

[dependencies]
string = { git = "https://github.com/FuelLabs/sway-libs", tag = "v0.8.1" }
ownership = { git = "https://github.com/FuelLabs/sway-libs", tag = "v0.8.1" }
storage_string = { git = "https://github.com/FuelLabs/sway-libs", tag = "v0.8.1" }

Our Sway contract would then import these as so:

contract;

use string::String;
use storage_string::StorageString;
use ownership::owner;

Proposed Change

Instead, if we organize the repository akin to the std lib with a root Forc.toml file, we would have the following dependencies and imports:

[dependencies]
sway_libs = { git = "https://github.com/FuelLabs/sway-libs", tag = "v0.8.1" }

contract;

use sway_libs::{string::String, storage_string::StorageString, ownership::owner};

Motivation

As more libraries are introduced, it may make sense to move away from workspaces to reduce the number of individual imports.