[critical] cpackget update-index does not fetch a new copy of the pdsc files in .Local

[jkrech]

Describe the bug
cpackget does not support checking for updates of local packs.

To Reproduce
All packs that are not listed in the .Web/index.pidx are referred to as local packs. The initial installation of such a pack requires a fully qualified location when running cpackget add. During the installation, a copy of the pdsc file will be stored in the pack directory .Local. During the update of the package description files running cpackget update-index for each package description file in .Local cpackget shall attempt to copy the potentially updated pdsc file from the location specified by the <url> element in the pdsc file (origin).

 copy -f <url>/<vendor>.<name>.pdsc  $CMSIS_PACK_ROOT/.Local/

Steps to reproduce the behavior:

1. create a pack with a packID that does not exist in the public index: ./Web/index.pidx
2. specify a local <url> on the file system something like file:///c:/your_local_pack/repo
3. place the pack and a copy of the pdsc in the <url> specified above
4. run cpackget add <url>\packID.<version>.pack
5. create a new pack version and update the pdsc located here <url>.
6. run cpackget update-index
   => nothing happens

Expected behavior
=> the update pdsc file in <url> is copied into .Local having a new version in the section
As a consequence this new version could be installed running cpackget add <packID>.<version>
Note: during cpackget update-index a message

 I: <packID> can be upgraded from "a.b.c" to "a.b.d"

Environment (please complete the following information):

• OS: all
• Version: all