[GraphQL] add emitSchemaFile to configuration

[mschnee]

Following up on our discussion in #7938, we should update the GraphQL Server/Component configuration to support TypeGraphQL's emitSChemaFile configuration option.

[mrmodise]

Thanks @mschnee. I will put a PR together for this to guide the discussion further

[mrmodise]

As promised:

#8024

We have 3 options:

const schema = await buildSchema({
  resolvers: [ExampleResolver],
  // automatically create `schema.gql` file with schema definition in project's working directory
  emitSchemaFile: true,
  // or create the file with schema in selected path
  emitSchemaFile: path.resolve(__dirname, "__snapshots__/schema/schema.gql"),
  // or pass a config object
  emitSchemaFile: {
    path: __dirname + "/schema.gql",
    commentDescriptions: true,
    sortedSchema: false, // by default the printed schema is sorted alphabetically
  },
});

I opted for:

emitSchemaFile: {
    path: __dirname + "/schema.gql",
    commentDescriptions: true,
    sortedSchema: false, // by default the printed schema is sorted alphabetically
  },

As it gives users more control