Add WebSocket ultrasonic JSON parsing and preserve raw WS send behavior

[musfaagv]

Motivation

• Enable first-class support for devices that send JSON over WebSocket (specifically ultrasonic sensor payloads) while keeping existing line-based serial parsing intact.
• Keep raw incoming messages logged to the console store for debugging and provide a non-blocking UX hint when WS JSON looks invalid.
• Allow sending exact JSON commands (e.g. LED control) over WebSocket without auto-appending a newline, while preserving newline behavior for serial connections.

Description

• Add src/utils/wsPayload.ts with parseUltrasonicPayload() to parse { "type": "ultrasonic", "cm": number, "inch": number } payloads and return numeric values.
• Update src/App.tsx to always call consoleStore.addIncoming(line), detect ultrasonic JSON via parseUltrasonicPayload(), auto-set series to ['cm','inch'] on the first valid ultrasonic message, append [cm, inch] to the chart, and otherwise fall back to parseHeaderLine/parseDataLine line parsing.
• Update console components: add connectionType prop to SerialConsole and ConsoleInput; in WebSocket mode outgoing messages are sent verbatim (no appended \n), while serial mode retains existing newline behavior; ConsoleInput shows a non-blocking WS JSON validation hint when the input looks like invalid JSON.
• Add unit tests src/utils/__tests__/wsPayload.test.ts covering valid ultrasonic payloads, non-ultrasonic JSON, missing numeric fields, and invalid JSON.

Testing

• Ran static type check with npm run typecheck and it completed successfully.
• Ran lint with npm run lint and it completed successfully.
• Ran unit tests for the new parser with npm run test -- src/utils/__tests__/wsPayload.test.ts and all tests passed (4 tests).

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Codex Task