Company validation, and AI invoices

New

• The company validation workflow, with banners and a validation dialog.
• AI Invoices.
• Import and export of companies.
• Person import from a spreadsheet.
• RCS inferred from a dropped document.
• The variable extension for Tiptap; a templates overview; country flags in company add.

Improved

• Documents can be dropped into the creation workflow drawer.
• Tooltips on the editor menu bar; hovering a name highlights it on the graph.
• A stock options security class.