[Docs]: rework documentation

### Describe the documentation issue

currently within the docs there are several spelling and grammatical issues.
Those need to be corrected.

The whole documentation needs a rework (including the gifs)

### Links

https://github.com/AndreasAugustin/go-gitmoji-cli

### Acknowledgements

- [X] I may be able to submit a pull-request to fix this issue.