Feature Request: compile to standalone TypeScript, or generate typings

I'm trying to validate JSON against a TypeScript interface. I used https://github.com/vega/ts-json-schema-generator to generate a JSON schema from the interface, then used `ajv-cli` to produce a standalone validator from the schema. The validator is an ES module with a default export function which takes the output of `JSON.parse` and returns true if the data is valid, or sets an `errors` property on the function and returns false otherwise.

I can write my own typings to describe this generated module, but it would be nice if the CLI could generate TypeScript code directly (with a flag like `-code-ts`), *or* add JSDoc annotations from which TypeScript can infer type information (at least for the one exported function), *or* create a .d.ts file describing the export(s) in the output directory (when run with a -o flag).

As an aside, if there's an easier way to get from what I have (TS interface) to what I want (runtime validation function), I'm happy to take other suggestions.