Add nested settings support

[yofukashino]

added support for nested settings and fixed type for findInReactTree

this pr will close #383

sorry closed the old pr by mistake coz of renaming the branch. sorry

[asportnoy]

To prevent breaking changes, add a fallback as the original string with the dot included.

[yofukashino]

To prevent breaking changes, add a fallback as the original string with the dot included.

i dont get what you mean. if you think not including . will break for not nested settings then its not the case ig

edit: i dont get what you mean after reading multiple times so can you elaborate or say in simpler terms

[asportnoy]

If an addon is already relying on a key like hello.world, that data essentially will be wiped after this PR. So the initial behavior needs to be added as a fallback on the getter.

[yofukashino]

How do I add that? Any ideas?

[asportnoy]

Just add a fallback to use the initial behavior if the new behavior is undefined

[yofukashino]

How do I decide if new behavior is undefined or not. What is the new behavior anyways

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[yofukashino]

fixed types, and fallback value usage. also added a check if the key given is already in settings ignoring the path separator it will be treated as a key.
well should be enough for what you wanted