Describe the bug
When using the pg_vector extension, while it's possible to not use a length, it's very typical to enter a column size when creating a vector column. However pgAdmin does not support creating/editing a column with dimensions. It also does not display the dimensions when viewing table properties.

To Reproduce

1. Install the pg_vector extension
2. Create a table and add a colun of type 'vector'. Observe it's not possible to use a size
3. Drop the column and now execute some manual SQL. "ALTER TABLE ADD COLUMN embedding vector(1408)"
4. Refresh and view table properties. Observe no column size info is displayed

Expected behavior
Should be able to enter the column size and also view column size

Error message
N/A

Desktop (please complete the following information):

• OS: OSX Sequoia 15.1.1
• Version: 8.13
• Mode: Desktop
• Package type: DMG
• Postgres/pgvector versions: 17 + 0.8.0