Handle new Types and Directives in VSCode

[martzoukos]

We need to check what the current support is for the newly added types and directives:

New Types

• Postgres: Money (mapped to Float Prisma scalar),
• Postgres: InetAdress (String)
• Postgres: OID (Integer)
• Postgres: citext (String)
• MySQL: Set (String)
• Unsupported()

Directives

• @@ignore, for models
• @ignore, for fields

First we need to define what kind of functionality makes sense for each of the above. Is just hiding the type error enough (maybe yes for start)? Do we need to offer some kind of autocomplete?

[martzoukos]

Duplicate: #679