feat: harmony-cli v0.1 #8 (#9)

Co-authored-by: tahahawa <tahahawa@gmail.com>
Reviewed-on: NationTech/harmony#9
Reviewed-by: johnride <jg@nationtech.io>
Co-authored-by: Taha Hawa <taha@taha.dev>
Co-committed-by: Taha Hawa <taha@taha.dev>

README.md

@@ -8,6 +8,26 @@ This will launch Harmony's minimalist terminal ui which embeds a few demo scores
 
 Usage instructions will be displayed at the bottom of the TUI.
 
+`cargo run --bin example-cli -- --help`
+
+This is the harmony CLI, a minimal implementation
+
+The current help text:
+
+````
+Usage: example-cli [OPTIONS]
+
+Options:
+  -y, --yes              Run score(s) or not
+  -f, --filter <FILTER>  Filter query
+  -i, --interactive      Run interactive TUI or not
+  -a, --all              Run all or nth, defaults to all
+  -n, --number <NUMBER>  Run nth matching, zero indexed [default: 0]
+  -l, --list             list scores, will also be affected by run filter
+  -h, --help             Print help
+  -V, --version          Print version```
+
 ## Core architecture
 
 ![Harmony Core Architecture](docs/diagrams/Harmony_Core_Architecture.drawio.svg)
+````