feat: anthropic js instrumentation

[GeLi2001]

resolves #2231

---

Note

Introduces a new JS package providing OpenInference/OpenTelemetry instrumentation for Anthropic messages.create, including streaming, tool use, token usage, examples, and tests.

• New package: js/packages/openinference-instrumentation-anthropic
  • v1.0.0 initial release with TypeScript support, README, and CHANGELOG.
• Instrumentation:
  • Adds AnthropicInstrumentation (src/instrumentation.ts, exported via src/index.ts) to trace anthropic.messages.create().
  • Supports streaming responses (consumes Stream chunks), tool/function calling, and token usage attributes.
  • Emits OpenInference-compliant LLM spans with input/output messages, invocation params, model/provider, and error status handling.
  • Optional traceConfig and custom TracerProvider support.
• Examples: Basic usage, streaming, and tool-use demos in examples/*.
• Tests: Basic enable/disable and config tests in test/instrumentation.test.ts.
• Build/Config: Package metadata (package.json), tsconfigs, Vitest config; workspace lockfile updated.

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