really portable option

[SebCanet]

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Describe the request

Hi, sorry to bother you with this question that comes back every year I think, but can't you implement a real option to use portableversion? A real one? After updated to v1.x I cannot anymore use arduino-cli.yaml with relative folder like I did before:

directories:
  data: ./data
  downloads: ./suppr
  user: ../sketchbook

Thanks a lot.

Describe the current behavior

Actually arduino-cli always use the /Arduino15 folder.

Arduino CLI version

1.2.0

Operating system

Windows

Operating system version

11

Additional context

No response

Issue checklist

• [x] I searched for previous requests in the issue tracker
• [x] I verified the feature was still missing when using the nightly build
• [x] My request contains all necessary details