Improve the readme

README.md

@@ -1,10 +1,22 @@
 # shell - cross-platform bash compatible shell
 
+The idea of the `shell` project is to build a cross-platform shell that looks and feels similar to bash (while not claiming to be 100% bash compatible).
+The project is written in Rust.
+
+The most common bash commands are implemented and we are linking with the `coreutils` crate to provide the most important Unix commands in a cross-platform, memory safe way (such as `mv`, `cp`, `ls`, `cat`, etc.).
+
+This new shell also already has _tab completion_ for files and directories, and _history_ support thanks to `rustyline`.
+
+The project is still very early but can already be used as a daily driver.
+
 ## How to run this
 
-To compile and run the project, you need to have Rust installed.
+To compile and run the project, you need to have Rust & Cargo installed.
 
 ```bash
-cargo r -- ./scripts/script_1.sh
-cargo r -- ./scripts/script_2.sh
-```
+# To start an interactive shell
+cargo r
+
+# To run a script
+cargo r -- -f ./scripts/hello_world.sh
+```

scripts/hello_world.sh

@@ -0,0 +1 @@
+echo "Hello World!"