Improve partner edit form

[katjam]

Acceptance Criteria for minimal improvement

• [ ] #970
• [x] #2419
• [ ] #2420

For future consideration

Kim had a crack at some AC / making the current ticket less vague but its probably really over featured. feels like a bit of a ball of string to untangle whats going on here

Partners form is broken down into different tabs for subnavigation:

• [ ] Add a tab that shows all the partner info statically (i.e. so you can get more of a preview how it looks in the public interface)
• [ ] Add a tab that shows all the events a partner has statically (ditto - currently this isn't displayed in one place in the admin screen)
• [ ] Basic info tab: "Basic Information" and "Place" sections (ideally these would be on sep pages but i think that will be a pain for validation). Also "Opening times" prob makes most sense to be under the address.
• [ ] Contact info tab: "Online", "Contact Information"
• [ ] References tab: Current "Tags" section and "Connected entities" section, but redo the sections as just "partner admins", "calandars", "partnerships", "categories", "facilities" (i.e. ditch current subheadings)
• [ ] Moderation tab: "Moderation" section
• [ ] A "save and continue" button is at the bottom of basic info and contact info
• [ ] "Save" on "References" goes to the basic info page

Originally posted by @kimadactyl in https://github.com/geeksforsocialchange/PlaceCal/issues/970#issuecomment-2058817004

[kimadactyl]

Suggested gem via quinn: https://github.com/zombocom/wicked