feat: speech-to-text for pi via NVIDIA Speech NIM realtime ASR

- asr_transcribe / asr_health tools + the /asr command, with live partials,
  per-word timings, transcript export and TUI rendering
- zero-dependency realtime client (https + Node 22 global WebSocket):
  mint transcription session -> subprotocol handshake -> event loop -> quiescence
- decodes anything ffmpeg supports (and native 16k mono/stereo pcm16/pcm_f32le wav)
  to the 16 kHz mono PCM16 the NIM mandates
- credentials via ASR_API_KEY / ASR_NIM_URL or ~/.pi/agent/asr.json; never in source
- README documents the six places the published API reference diverges from the
  deployed protocol (commit vs done, cumulative deltas, double .completed,
  HTTP 403 at upgrade, ?token= not rejected, model reset on session.update)

package.json

@@ -0,0 +1,29 @@
+{
+  "name": "pi-asr",
+  "version": "0.1.0",
+  "description": "Speech-to-text for the pi coding agent: asr_transcribe / asr_health tools and the /asr command, backed by an NVIDIA Speech NIM realtime streaming ASR endpoint (Parakeet/Nemotron).",
+  "keywords": [
+    "pi-package",
+    "pi-extension",
+    "asr",
+    "speech-to-text",
+    "transcription",
+    "nvidia-nim",
+    "streaming-asr"
+  ],
+  "type": "module",
+  "peerDependencies": {
+    "@mariozechner/pi-ai": "*",
+    "@mariozechner/pi-coding-agent": "*",
+    "@mariozechner/pi-tui": "*",
+    "@sinclair/typebox": "*"
+  },
+  "pi": {
+    "extensions": [
+      "./extensions"
+    ]
+  },
+  "engines": {
+    "node": ">=22"
+  }
+}