improve readme

Author: Bendzae

Readme.md

@@ -12,14 +12,51 @@ G-stack is a CLI util to simplify creating stacked branches and pull requests on
 ## Configuration
 
 To be able to create and modify github prs a personal access token is needed.
-To specify it create a config file with the following content in `$HOME/.gstack/config.toml`
+Check [the official github docs](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens)
+and make sure the token has read/write access to pull requests.
+Then create a config file with the following content in `$HOME/.gstack/config.toml`
 
 ```toml
 personal_access_token = "<GITHUB_PERSONAL_ACCESS_TOKEN>"
-
 ```
 
 ## Usage
 
 _Show available commands_
-`gs help`
+
+```bash
+gs help
+```
+
+_Create a new stack_
+
+Creates a new stack with the current branch as a base and checks out the new branch
+
+```bash
+gs new
+```
+
+_Add a new stack branch_
+
+Stacks a new branch on top of the current stac
+
+```bash
+gs add
+```
+
+_Moving through stack branches_
+
+Move up and down trough stack branches with:
+
+```bash
+gs up
+gs down
+```
+
+or interactively select a stack branch with
+
+```bash
+gs change
+#or
+gs c
+```