feat(ls): completions for PostgreSQL index types

[Jolg42]

Closes #1139

schema for manual testing

datasource db {
    provider = "postgresql"
    url      = env("DATABASE_URL")
}

model ops {
    id    Int @id
    title   String
    content String
    
    @@index([title( )], type: Gist)
//                 ^ sort, ops
}

model type {
    id    Int @id
    title   String
    content String
    
    @@index([title], )
//                  ^ fields, map, type
}

model A {
  id  Int    @id
  title String @db.Inet

  @@index([title(ops: )], type: Gist)
//                   ^ See the native type of `title` is `Inet` and
//                     the index type is GiST
//                     it suggests `InetOps` & `raw`.
}

model B {
  id  Int    @id
  title String @db.Inet

  @@index([title], type: )
//                       ^ Gist, Gin, SpGist, Brin, Hash or BTree
}

model C {
    id    Int @id
    title   String
    content String
    
    @@index([title(ops: )], type: Gist)
//                      ^ raw
}

[github-actions]

🤖 Pull request artifacts

file	commit
pr1178-prisma.vsix	68e4395

[github-actions]

Try this extension build via GitPod

[jkomyno]

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