docs: include --debug info and rename headers

README.md

@@ -18,18 +18,32 @@ To run the tool, simply run `ch` in your terminal.
 ch
 ```
 
+### `-a`
+
 If you want to run `git add -A` before committing, use the `-a` flag
 
 ```bash
 ch -a
 ```
 
+### `--dry-run` or `-d`
+
 If you want to do a dry run without actually adding or committing, use the `ch -d` or `ch --dry-run` flag.
 
 ```bash
 ch -d
 ```
 
+### `--debug`
+
+If you want to see the debug output, use the `ch --debug` flag.
+
+```bash
+ch --debug
+```
+
+Note that the debug output will not be printed if you use the `--dry-run` flag.
+
 ## Tech Stack
 
 -   [Rust](https://www.rust-lang.org/)