Support different zip structure

[EDM115]

Description

If an archive containing a PT plugin have a top level folder inside that contains the plugin, it'll work (ex : https://github.com/8LWXpg/PowerToysRun-SSH/releases/download/v1.2.1/SSH-v1.2.1-x64.zip)
However if all the content of the plugin is directly at the root of the archive (ex : https://github.com/GTGalaxi/quick-lookup-ptrun/releases/download/v1.3.3/QuickLookup-v1.3.3.zip), then ptr will not extract the files correctly (one folder too high in the arborescence)

Steps to reproduce

1. Have ptr installed
2. Run ptr add QuickLookup GTGalaxi/quick-lookup-ptrun
3. Notice that instead of having this :

   ❯❯ C:\Users\EDM115\AppData\Local\Microsoft\PowerToys\PowerToys Run\Plugins
   ❯ tree /F
   Structure du dossier pour le volume Windows-SSD
   Le numéro de série du volume est 64BC-ABC7
   C:.
   │   version.toml
   │
   └───QuickLookup
   │   plugin.json
   │   PowerToys.Common.UI.dll
   │   PowerToys.ManagedCommon.dll
   │   QuickLookup.dll
   │   tools.json
   │   Wox.Infrastructure.dll
   │   Wox.Plugin.dll
   │
   └───img
           ql.dark.png
           ql.light.png

   we have this :

   ❯❯ C:\Users\EDM115\AppData\Local\Microsoft\PowerToys\PowerToys Run\Plugins
   ❯ tree /F
   Structure du dossier pour le volume Windows-SSD
   Le numéro de série du volume est 64BC-ABC7
   C:.
   │   plugin.json
   │   PowerToys.Common.UI.dll
   │   PowerToys.ManagedCommon.dll
   │   QuickLookup.dll
   │   tools.json
   │   version.toml
   │   Wox.Infrastructure.dll
   │   Wox.Plugin.dll
   │
   └───QuickLookup
       ql.dark.png
       ql.light.png

[8LWXpg]

As stated in README, we need a separate logic on different zip structure, which I don't have a clear idea now.

[EDM115]

maybe a check like this :

flowchart LR
    A{Does the archive have only a single directory inside ?} -- Yes --> B[Do what you already do];
    A -- No --> C{Is there at least one .dll file inside ?};
    C -- Yes --> D[Extract all the content of the archive in a new directory with the name that the user has chosen];
    C -- No --> E[Probably invalid archive, dunno how to process];

[8LWXpg]

I ended up using a completely different approach due to how ZipArchive structured. You can check it if you're curios.

https://github.com/8LWXpg/ptr/blob/754896eb77628ff1ef82bc3641e1a8e1682385a4/src/util.rs#L122-L152