Write a shell & bash script to help with creating .zip mods for portal upload

[notnotmelon]

Currently it is quite a manual process to zip together mods for release. This process must be automated via both a shell and bash script.
These scripts will be placed in the rivets-mod-template repo.

Both scripts should take the following steps:

• run cargo build
• extract the artifact into the mod's root directory
• run git archive to convert the unzipped mod into a zip mod

should be a similar command to
git archive --format zip --prefix [YOUR-MOD-NAME]/ --worktree-attributes --output [YOUR-MOD-NAME]_[VERSION].zip HEAD

note that .rs files and the target folder must be excluded from ending up in the archive via .gitattributes or similar.