Added display attributes for bucket posts

[JoelWiebe]

Added display attribute coordinates for posts created in CK Workspace with bucket destinations

TODO

• Test that posts are created in ck workspace with bucket destination without error
• Confirm that if these posts are moved to the canvas that they have position coordinates on the canvas
• Verify that this resolved the previous issue with displayAttributes error in dalPost.ts

Closes #690

[marieklinaeva]

Tested that posts are created in ck workspace with bucket destination without error - test successful
Confirm that if these posts are moved to the canvas that they have position coordinates on the canvas - posts are getting stacked directly on top of each other if I use the AI assistant to move them from the buckets to the canvas

[JoelWiebe]

@marieklinaeva Thanks! Yes, the default behaviour that existed for CK Workspace when creating posts directly to the canvas was to stack them, so I just applied this to posts created for the buckets as well.

Let's fix this behaviour in a future issue.