[FEATURE] Add support for downloading specific folders from Git repositories

[flier268]

Is your feature request related to a problem? Please describe.
Currently, there's no straightforward way to download a specific folder from a Git repository within this Docker image. This is particularly problematic when trying to use modules that aren't packaged and released, but are available on Git. Typically, users would use tools like DownGit for this purpose, but this isn't possible within the current Docker environment.
Describe the solution you'd like
I would like to see support added for downloading specific folders from Git repositories. This could be achieved by:

Integrating DownGit functionality directly into the Docker image.
Implementing a custom solution that allows users to specify a Git URL and a subfolder path, then downloads only that folder.
Adding a tool or script that can clone a repository and extract a specific folder, then clean up the rest.

Describe alternatives you've considered

Manually downloading the folder outside the Docker environment and then copying it in, but this defeats the purpose of having a self-contained system.
Using git sparse-checkout, but this requires more complex setup and might not be ideal for all use cases.
Writing a custom script to use git archive, but this would require additional setup and maintenance.

Additional context
This feature would greatly improve the usability of the Docker image, especially for users who need to work with unpacked modules or specific parts of larger repositories. It would streamline the workflow and make it easier to integrate various Git-hosted resources into projects.

[erdoking]

maybe a workaround:

example:
https://github.com/BlackRabbitMsk/projectz-free-modpack/ can be AUTO ZIP by github as https://github.com/BlackRabbitMsk/projectz-free-modpack/archive/refs/heads/main.zip

1. open the repo
2. klick on the green CODE Button
3. Download Zip (copy Link)
4. the nice mods_downloader.sh extract the zip and search for all directorys containing a Modinfo.xml
5. the folders automatic moved to the MODS directory

[flier268]

Thanks for @erdoking , bit I don't want all of them in the repo, just someone