Auto Register stores dir in all layers

[OsamaHaikal]

Currently if user did not specify custom storesDir then the expected to auto import stores from stores dir but this is not working inside layers

1. Added automatic registration of the stores directory across all Nuxt layers.
2. Updated the documentation to clarify configuration handling with Nuxt layers.

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[marr]

will this still register the stores dirs defined in layers if the main app defines it's own storesDirs? It seems like that null check would make it only apply the layers stores when the parent app sets it to null.

[OsamaHaikal]

No because The options are resolved and merged from both the main app (layer) and all other layers. So If the user has defined storeDirs in either the main layer or any additional layer, there is no need to fallback to defaults, as this was the old behavior also

[tommie]

This looks very good; thanks for writing the patch. I was just hitting this layer issue.

Why change the falsey check into a null check? If you want to keep it so, perhaps use ===.

(I wonder why the second if-statement isn't an else. Might want to clean that up while at it.) Never mind, it's building on the previous one.

[tommie]

I made this wrapper module to work around this issue: https://gist.github.com/tommie/1e505f3f7a281698bdb9fdc7a303e6c0

[OsamaHaikal]

Thank you

Why change the falsey check into a null check? If you want to keep it so, perhaps use ===.
I thought that !options..storesDirs is not clear enough and since the need for the check for undefined and null i did ==