Document share links, folder imports, and more

Share entire folders with public links any collaborator can open - subcontractors, consultants, head contractors - without a BuildPass account. This round of Documents upgrades also lets you import a folder structure from an existing project, cutting setup steps that used to repeat on every job.
- Folder sharing - share entire folders with workers in one action instead of per-file
- Public links - generate a link anyone can use to view a folder, even without a BuildPass account
- Import folder structure - copy a folder tree from an existing project when setting up a new one, also available in the Drawings module
To get started, open Documents and pick a folder to share, or use "Import folder structure" from the project setup flow.