Make edit post page

[2blo]

• [x] use the existing upload component
• [x] move out upload component to own file
• [x] new edit page
• [x] mode variable upload or edit
• [x] populate fields with thumbnail data
• [x] save button
• [x] cancel button
• [x] editById instead of upload
• [x] update meny dropdown link
• [x] dont persist to local storage for edit page
• [x] convert vid to youtube link for ux when populating edit fields
• [x] avoid ~make prettier~ loading state - in user list - we query all posts anyway to get before, after + title, id just need to include desc
• [x] make id query param too.
• [x] edit post from post page + delete
• [x] #66
• [x] disallow nav to edit page from url,
• [x] figure out whether to allow nullish and undefined description vs ""

Notes

• null is a value
• undefined means undefined XD
• "" is ... well

toilet paper analogy

lets try with empty strings everywhere, undefined in prisma may mean we dont update a field, or even include it

• a required field cannot be set to null, but it can be set to undefined in the query - it means we dont update it.

null seems like bad practive, prefer undefined