Metadata custom file name and save location

[slimezan]

Describe the bug Metadata does not save within the same folder/zip as the downloaded content and there are no name customization options to rename the metadata.

The metadata by default saves as info.json. It also saves by default to the relative location you set, rather than within the folder/zip of the images

Expected behavior When I select Download Metadata in the settings, I should be able to customize my settings to change the default name of the metadata file instead of it defaulting to "info.json". When I download something I want from pixiv, the metadata should save within the newly created folder/zip

Example work from Pixiv Should be similar to how you have it set up for the other download locations.