Migrate repository to TypeScript + Zod targeting ES2022

[Copilot]

Converts the codebase from JavaScript to TypeScript with Zod schemas for type inference, targeting ES2022.

TypeScript Migration

• Added tsconfig.json targeting ES2022 with CommonJS output to /build
• Converted all source files: files.ts, resolvePaths.ts, validate.ts, index.ts, schemas/index.ts, schemas/dereferenceSchemas.ts
• Updated package.json: main → build/index.js, added types field, updated build scripts

Zod Schemas

• Created src/zodSchemas/index.ts with comprehensive Zod schemas for all v3 types
• Exports both schemas and inferred TypeScript types

import { 
  configV3Schema, 
  stepV3Schema, 
  type ConfigV3, 
  type StepV3 
} from 'doc-detective-common';

const config: ConfigV3 = configV3Schema.parse(myConfigObject);

Dependencies

• Added: typescript, ts-node, @types/node, @types/uuid (dev)
• Added: zod@3.24.3, uuid@13 (runtime)

Backward Compatibility

• AJV remains primary validation engine for JSON schemas
• All 304 tests pass
• v2→v3 schema transformations preserved

Original prompt

Migrate the repository to Typescript+Zod. Target ES2022.

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