Featue Request: Possible to include separate folder include?

Something like 

```bash
{.sh include='test/lmao.sh'}
```
 
or maybe

```bash
{.sh include="./test/lmao.sh"}
```

or whatever you feel like would be cool

sorry for just asking for stuff instead of trying to contribute myself but I'll take a look through the source code when i have some time.

Thanks a ton for making this eitherway and you're the goatt!!
