Add TypeSpec example for iRacing data API

examples/iracing-typespec/.gitignore

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+# MacOS
+.DS_Store
+
+# Default TypeSpec output
+tsp-output/
+dist/
+
+# Dependency directories
+node_modules/

examples/iracing-typespec/README.md

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+# iRacing `/data` API (TypeSpec)
+
+This example ports a small slice of the `/data` API schema into [TypeSpec](https://microsoft.github.io/typespec/). It mirrors
+structures from `@iracing-data/api-schema` and the OpenAPI generator in `@iracing-data/api-schema-to-openapi`, but uses TypeSpec's
+native emitters to produce OpenAPI definitions.
+
+## Getting started
+
+Install dependencies and compile the TypeSpec project:
+
+```bash
+pnpm install
+pnpm --filter @examples/iracing-typespec build
+```
+
+The included `tspconfig.yaml` is configured to emit OpenAPI v3.1 JSON into `./dist/iracing.typespec.openapi.json`.
+
+## Project layout
+
+- `main.tsp` — The TypeSpec surface area that maps `/data` endpoints to operations.
+- `tspconfig.yaml` — Configures the OpenAPI emitter and lints with the standard HTTP/REST rules.
+- `package.json` — Declares the TypeSpec toolchain dependencies.