Add TypeScript drawing example mirroring Python drawing sample

[Copilot]

This PR adds a TypeScript example equivalent to the Python drawing sample from PR #238, so the same structured drawing workflow is available in both SDKs. It introduces schema-driven translation for drawing intents plus a renderer output path in the TypeScript examples set.

• New drawing example workspace

  • Added typescript/examples/drawing with its own package.json, tsconfig, README, and sample prompts.
  • Wired into the existing examples workspace build flow.

• Drawing schema + translator loop

  • Added drawingSchema.ts with Drawing, Box, Ellipse, Arrow, Style, and UnknownText.
  • Added main.ts that translates user input to Drawing JSON and keeps request history across turns to support iterative refinements.

• Renderer output

  • Added render.ts to convert translated drawing objects into SVG primitives (rect, ellipse, line with arrow marker), including style handling (fill/stroke/dash/corners).
  • Writes rendered output to dist/drawing.svg on successful translations.

• Examples index update

  • Added Drawing to typescript/examples/README.md so it appears in the canonical example list.

const validator = createTypeScriptJsonValidator<Drawing>(schema, "Drawing");
const translator = createJsonTranslator(model, validator);

const response = await translator.translate(history.join("\n"));
if (response.success) {
  fs.writeFileSync(outputPath, renderDrawingToSvg(response.data), "utf8");
}

[Copilot]

Pull request overview

Adds a TypeScript counterpart to the Python drawing sample (PR #238): a new drawing example workspace that translates natural-language requests into a typed Drawing JSON via TypeChat and renders the result to SVG.

Changes:

• New typescript/examples/drawing workspace (package.json, src/tsconfig.json, README) wired into the examples workspaces.
• drawingSchema.ts defining Drawing/Box/Ellipse/Arrow/Style/UnknownText, plus a main.ts interactive loop that joins request history before translating.
• render.ts that emits SVG (rect/ellipse/line with arrowhead marker, fill/stroke/dash/rounded corners) and writes to dist/drawing.svg.

Show a summary per file

File	Description
typescript/examples/README.md	Adds Drawing to the canonical example list.
typescript/examples/drawing/README.md	New per-example README and usage instructions.
typescript/examples/drawing/package.json	New workspace manifest mirroring the math example.
typescript/examples/drawing/src/tsconfig.json	Strict TS build config for the example.
typescript/examples/drawing/src/drawingSchema.ts	New schema with shape, style, and unknown-text types (uses snake_case props).
typescript/examples/drawing/src/main.ts	Translator loop that appends to history before translating.
typescript/examples/drawing/src/render.ts	Converts Drawing to SVG primitives with style handling.
typescript/examples/drawing/src/input.txt	Sample iterative prompts.

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• Files reviewed: 8/8 changed files
• Comments generated: 2