Some scalar names conflict with TypeScript syntax

[fiadliel]

Description

Some TypeScript type names are derived from the GraphQL scalar name in such a way that they conflict with TypeScript syntax. I have one example here; the scalar named bigint causes tsc errors.

Reproduction Steps/Repo Link

Use a schema like

scalar bigint

type Query {
  b: bigint
}

Run tsc --noEdit, it will return these errors:

.../modules/scalar.ts:16:13 - error TS2457: Type alias name cannot be 'bigint'.

16 export type bigint = $$Utilities.Schema.Scalar.ScalarCodecless<"bigint">;
               ~~~~~~

.../modules/schema.ts:254:20 - error TS2724: '".../modules/schema".Schema' has no exported member named 'bigint'. Did you mean '$bigint'?

254     bigint: Schema.bigint;
                       ~~~~~~

(actually the issue on line 254 looks a little different, a mistake in how this value is escaped - not sure if worth reporting separately)