[Feature]: support .tool-versions in parent directories

asdf supports creating a .tool-versions in some directory. These versions are used in this directory and all sub-directories (see)

1. Your usage scenarios?

create following structure

test 
- .tool-versions => nodejs 21.x
- foo 
- - .tool-versions => nodejs 22.x
- bar
- - no tool-versions

If I access ~/test/bar I always want to have Node Versoin 21.x active. At the moment the previous node version is active

2. What is your expected outcome?

The idea is that I can automatically activate the respective version for certain folder structures without having to actively maintain this in each directory.