Add guides and tutorials to docs

https://chrisnicholas.dev/blog/how-to-write-exceptional-documentation

You may find [llms-full.txt](https://livecodes.io/docs/llms-full.txt) helpful if you use some AI help.

Edit:
These are some ideas for tutorials:
- [ ] Create a React project
- [ ] Add Tailwind CSS styling
- [ ] Create custom starter templates
- [ ] Import from GitHub
- [ ] Add images from your device
- [ ] Deploy your projects
- [ ] Save code snippets
- [ ] Create unit tests
- [ ] Broadcast live coding
- [ ] Create code screenshots
- [ ] Embed playgrounds in your web site

If you have more ideas please add them below.