Company: base structure

Top-level folders: 00_Inbox, 01_Admin, 02_Finance, 03_Clients, 04_Projects,
05_HR, 06_Contracts, 07_Marketing, 08_Templates, 99_Archive.

File names: YYYY-MM-DD_Party_DocumentType_Reference.pdf
Approves new top-level folders: (add a name)
Retention schedule agreed with the accountant: (add it here)
