Add Indexes to Drizzle schema

[trueberryless]

Drizzle ORM supports Indexes.

Generally speaking, columns which are often used in filters or where clauses should be indexed. Here is a code snipped for indexing:

export const user = pgTable("user", {
  id: serial("id").primaryKey(),
  name: text("name"),
  email: text("email"),
}, (table) => {
  return {
    nameIdx: index("name_idx").on(table.name),
    emailIdx: uniqueIndex("email_idx").on(table.email),
  };
});

All indexes must have a name since the beginning, so they will never run into issues like #4