More efficient thumbnail generation about froshwebp

[shyim]

You only need it to run once. The webp images are generated when you upload the image. Just like the others

[DanMan]

Then there's a bug here. WebP images are not generated unless I execute the CLI command.

Probably because of my old problem that the Plugin doesn't properly detect that WebP support is available (system info status page says no, CLI status says yes).

I suppose this line fails to actually find the cwebp executable that was downloaded by the plugin itself, when run through the backend.

The binary exists at {shopware root}/var/libwebp/bin/cwebp. I can't tell what cachedDownloadDir is actually pointing to from looking at the code. Where is that stored?

[DanMan]

See #57