[#55163] Build project-list sharing modal

[aaron-contreras]

• [x] Add ProjectQuery as a shareable resource
• [ ] Build the contracts to share ProjectQuery
• [x] Add a ShareDialog that will be added as an async dialog via Turbo
  • [x] Fix CSS top-layer issue with invite user form
  • [ ] Fix CSS issues with the modal
    • [ ] The ActionMenu Primer component uses an overlay to render its menu item list which ends up causing the container to span the entire width of the dialog for some reason
• [ ] Introduce a SharingStrategy pattern that wraps all of the content of the methods sharing_contract_scope, available_roles and potentially more to not end up with big case statements in the SharesController
• [ ] Add ShareDialogComponent to Lookbook

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See: https://community.openproject.org/work_packages/55163

[klaustopher]

When we add #15983 here, the modal already works in a super rough capacity

[aaron-contreras]

Rebased onto https://github.com/opf/openproject/pull/15983 in order to get the fixes on there over on this branch

[aaron-contreras]

Current modal rendering state

Known issues:

• [ ] Action Menu rendering inside the modal spans way too wide. I suspect this has something to do with the CSS top layer.

https://github.com/opf/openproject/assets/61627014/e53ba906-9152-416c-844e-203ea9c85e80

[klaustopher]

https://github.com/opf/openproject/pull/15983 has been merged and the generalize-sharing-modal branch is based on current dev, so I am rebasing this branch bakc onto generalize sharing modal, please pull with. git fetch --all && git reset --hard origin/implementation/55163-build-sharing-modal

[HDinger]

Current modal rendering state

Known issues:

* [ ]  Action Menu rendering inside the modal spans way too wide. I suspect this has something to do with the CSS top layer.

Screen.Recording.2024-06-26.at.21.54.28.mov

This is actually an issue of Primer itself where the automatic width calulation of ActionMenus inside Dialogs do not work, see https://github.com/primer/view_components/issues/2926. As a wrokaround for now, we have to enforce the width of the ActionMenu manually. Unfortnately, we thus have to accept that the width is not always ideal.