List policies of tables

[smaldd14]

Is your feature request related to a problem? Please describe.
It would be super helpful to add a supabase cli command to list policies for all your tables, or by table.

Would be especially useful when promoting AI models to give them more context on how you db and schema is set up.

Describe the solution you'd like
supabase policies list tableA returns a list of your policies on the table

Describe alternatives you've considered
You could use SQL to get it. Something like:

SELECT schemaname, tablename, policyname, roles, cmd, qual 
FROM pg_policies 
WHERE schemaname = 'public' and tablename = 'tableA'
ORDER BY tablename, policyname;