Offer a `recurseParent()` config option

[1cg]

This change allows you to configure a recursive search through parent directories for a .env file. This is useful in a multi-module project when you want to share a common .env file across multiple modules.

No worries if this isn't a feature you want, but I needed it for my own project.

[1cg]

pinging on this, any interest?

[Miuler]

Please, add suppor for this feature, the recursive search of .env works in other languages such as Rust and others, and is very useful.

@1cg @cdimascio