This uses AdwEntryRow and AdwPasswordEntryRow for text. Also, even though I kept it working in /r/2355, this drops username completion, as GtkEntryCompletion is not supported for AdwEntryRow and is also deprecated in GTK 4.10.
For multiline entries, AdwEntryRow doesn't support it, but I managed to create a mostly similar look to the single line entries. I didn't bother with making the title large when the entry is empty and unfocused, as Adwaita does a whole animation thing that I don't want to copy from them.
Integer fields did not really change, but we'll want to use AdwSpinRow when that's complete.

Opened Request Fields from Demo protocol.