feat(typescript-sdk): add Standard Schema v1 support for inputValidat…

[MistakenPirate]

Description

Adds Standard Schema v1 support to the TypeScript SDK's inputValidator and waitForEvent payloadSchema. This removes the Zod v3 lock-in and allows any Standard Schema compliant library (Zod v4, Valibot, ArkType, etc.) to be used for input validation.

Fixes # (issue)

Type of change

• New feature (non-breaking change which adds functionality)

What's Changed

• Added StandardSchemaV1 types (inlined from spec) and runtime utilities in standard-schema.ts
• Widened inputValidator type to accept z.ZodType | StandardSchemaV1
• Updated waitForEvent to accept Standard Schema for payloadSchema with proper overloads
• Replaced direct zodToJsonSchema / .parse() calls with unified helpers (schemaToJsonSchema, validateWithSchema)
• Exported StandardSchemaV1 and StandardSchemaValidationError from the v1 barrel
• Fully backward compatible, existing Zod v3 schemas work as before

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📝 Documentation updates detected!

New suggestion: Document Standard Schema v1 support for TypeScript SDK inputValidator and waitForEvent

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