No, you cannot share all your photos in iCloud between different AppleIDs.
But you can share all photos from an album using an iCloud Link.
- Select all photos from an album together.
- Tap the Share button, then "Copy iCloud Link".
- Now you can mail the link to the shared photos to your wife (and yourself) and she can see the shared photos as a folder on iCloud Drive.
Sharing the photos as an iCloud link will share them in the full resolution, while shared albums will only share them at a reduced quality. Using the iCloud Link you can import the photos in the full quality to your shared desktop computer.