Support debug/flutter adapter, update Zed dependencies

[Dixzz]

🧩 Summary

This PR integrates Dart Debug Adapter Protocol (DAP) support into zed-extensions/dart, allowing interactive debugging sessions directly within Zed via dart debug_adapter

IMPORTANT

Make sure you have: in project path .zed/debug.json

[
  {
    "label": "Debug Flutter App",
    "adapter": "dart", // DO NOT EDIT
    "type": "flutter",
    "program": "lib/main.dart",
    "args": ["--web-port=9090"]
  }
]

Steps shown:

1. Launch Debug Flutter App task in Zed using F4 or command pallet debugger: start
2. Hit breakpoint at main.dart
3. Inspect variable frames
4. Step through code

---

📸 Screenshots

Description	Image
Debug session launched

---

All supported schema for .zed/debug.json config

{
    "adapter": {
      "type": "string",
      "enum": ["dart"]
    },
    "type": {
      "type": "string",
      "enum": ["dart", "flutter"],
      "description": "Debug Flutter or Dart file"
    },
    "label": {
      "type": "string",
      "description": "Human-readable name for this debug configuration",
      "examples": ["Launch Dart App", "Debug Main", "Dart Console"]
    },
    "program": {
      "type": "string",
      "description": "Path to the Dart file to debug",
      "examples": ["lib/main.dart", "bin/main.dart", "test/example_test.dart"]
    },
    "args": {
      "type": "array",
      "description": "Arguments passed to the Dart program.",
      "items": {
        "type": "string"
      },
      "default": []
    },
    "device_id": {
      "type": "string",
      "examples": ["chrome", "edge", "<android-id>", "<ios-id>"]
    },
    "platform": {
      "type": "string",
      "examples": ["web", "desktop"]
    },
    "stopOnEntry": {
      "type": "boolean",
      "description": "Pause debugger on entry.",
      "default": false
    }
  }

[Dixzz]

Tested on:
Zed Preview: v0.192.3-pre
Flutter Version: Flutter 3.29.3