Packages archives should have a root folder

[cmaglie]

Otherwise, unpacking the archive litters the Downloads directory:

~/Downloads$ tar tfv arduino-flasher-cli-v0.3.0-linux-arm64.tar.gz 
-rwxr-xr-x runner/runner 17016722 2025-10-23 16:15 arduino-flasher-cli
-rw-r--r-- runner/runner    36906 2025-10-23 16:15 LICENSE
-rw-r--r-- runner/runner      511 2025-10-23 16:15 README.md

~/Downloads$ tar xfv arduino-flasher-cli-v0.3.0-linux-arm64.tar.gz 
arduino-flasher-cli
LICENSE
README.md

~/Downloads$ ls
arduino-flasher-cli                                <----
arduino-flasher-cli-v0.3.0-linux-arm64.tar.gz
arduino-unoq-debian-image-20250714-10
arduino-unoq-debian-image-20250714-10.tar.xz
LICENSE                                            <----
qdl_0.0.1_Linux_64bit.tar.gz
README.md                                          <----
teamviewer_15.69.4_amd64.deb
virtualbox-7.2_7.2.2-170484~Ubuntu~noble_amd64.deb

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