docs(README.md): add initial README.md

Author: criskell

README.md

@@ -1,5 +1,15 @@
 # osdev_rust
 
-`rustup component add llvm-tools-preview`
-`cargo build`
-`cargo run`
+A toy operating system developed in Rust for hobby and study purposes. The main idea is to work using existing crates, such as `linked_list_allocator`, to later create my own solutions in the areas I am studying. This allows me to evolve within a controlled environment, supported by ready-made tools while conducting experiments.
+
+## How to test
+
+Execute the following commands:
+
+- `rustup component add llvm-tools-preview`
+- `cargo build`
+- `cargo run`
+
+## References
+
+- https://os.phil-opp.com