feat(export): export metadata storage for picking

Description

This PR exports the metadata storage so that any helper script that wants to pick the metadata for partial / subclassing can work.

[x] the pull request title describes what this PR does (not a vague title like Update index.md)
[x] the pull request targets the default branch of the repository (develop)
[x] the code follows the established code style of the repository
- npm run prettier:check passes
- npm run lint:check passes
[x] tests are added for the changes I made (if any source code was modified)
[x] documentation added or updated
[x] I have run the project locally and verified that there are no errors

fixes #[issue number], fixes #[issue number]