Assignees, and a new access model

New

• A new membership model for team access.
• Assignees on the company creation workflow, with a filter and Slack reaction events.
• An embedded Stripe payment form replacing the hosted page.
• AI legal publication generation, improved, handling scanned PDFs.
• Node grouping and expansion on the org chart; several folders may share a name.
• A SIRENE button on the company overview.

Improved

• RNE used for persons, with a diff interface.
• Active mandates displayed first; status chips on invoice and quote rows.
• A quick file viewer; a reworked company add dialog.