Add features and shells to README

README.md

@@ -3,7 +3,28 @@
 
 ---
 
-This is very much work in progress, so please don't try to use it just yet!
+> ⚠️ This is very much work in progress, so please don't try to use it just yet!
+
+Starship is a Rust port of the minimalistic, powerful, and extremely customizable prompt [Spaceship ZSH](https://github.com/denysdovhan/spaceship-prompt).
+
+
+## Features
+
+### Prompt segments
+
+- [x] Prompt character turns red if the last command exits with non-zero code.
+- [x] Current Node.js version(`⬢`).
+- [ ] Current Rust version (`𝗥`).
+- [ ] Current battery level and status
+- [ ] Current Git branch and rich repo status.
+- [ ] Indicator for jobs in the background (`✦`).
+- [ ] Execution time of the last command if it exceeds the set threshold.
+
+### Shell support
+
+- [x] Fish shell
+- [ ] Z Shell
+- [ ] Bash
 
 ## Setup