Export Schema<Id> type in @ethdebug/format

... in case any users of this package want to try their luck with
something like json-schema-to-ts.

Specifically, do:

- Update the "yamls.ts" code generation step to output raw JSON objects
  for each schema (in addition to all the raw YAML strings currently
  output)
- Declare raw JSON objects `as const`, to preserve each schema object at
  the type-level
- Define a generic `Schema<Id>` type as a helper for getting the
  type of a schema with a given id

packages/format/bin/generate-schema-yamls.js

@@ -29,6 +29,9 @@ const readSchemaYamls = (directory) => {
 }
 
 const schemaYamls = readSchemaYamls(schemasRoot);
+const rawSchemas = Object.entries(schemaYamls)
+  .map(([id, yaml]) => ({ [id]: YAML.parse(yaml) }))
+  .reduce((a, b) => ({ ...a, ...b }), {});
 
 console.log(`export type SchemaYamlsById = {
   [id: string]: string;
@@ -37,4 +40,11 @@ console.log(`export type SchemaYamlsById = {
 export const schemaYamls: SchemaYamlsById = ${
   JSON.stringify(schemaYamls, undefined, 2)
 };
+
+const rawSchemas = ${
+  JSON.stringify(rawSchemas, undefined, 2)
+} as const;
+
+export type Schema<Id extends keyof typeof rawSchemas> =
+  (typeof rawSchemas)[Id];
 `);

packages/format/src/index.ts

@@ -1,2 +1,2 @@
 export * from "./describe";
-export { schemas, schemaIds } from "./schemas";
+export { schemas, schemaIds, type Schema } from "./schemas";

packages/format/src/schemas.ts

@@ -1,5 +1,6 @@
-import { schemaYamls } from "../yamls";
 import { describeSchema } from "./describe";
+import { schemaYamls } from "../yamls";
+export type { Schema } from "../yamls";
 
 export const schemaIds: string[] = Object.keys(schemaYamls);
 export const schemas = schemaIds