Start separate debug adapters for Metro and JS debugging (#1008)

Refactors the changes introduced in #964 to separate logging metro
messages and JS debugging into separate DAP Sessions. This will also
make integrating #1001 easier with other changes made to `DebugAdapter`.

### How Has This Been Tested: 
Open an app and check the debugger still works correctly:
- breakpoints and uncaught errors should still stop the application
- debugger controls in the preview should resume/step over breakpoints
- check profiling still works
- check if Metro errors are logged to the debug console.

packages/vscode-extension/package.json

@@ -288,7 +288,16 @@
     "debuggers": [
       {
         "type": "com.swmansion.react-native-debugger",
-        "label": "Radon IDE internal debugger for React Native",
+        "label": "Radon IDE internal debugger for React Native projects",
+        "hiddenWhen": "true",
+        "languages": [
+          "javascript",
+          "typescript"
+        ]
+      },
+      {
+        "type": "com.swmansion.js-debugger",
+        "label": "Radon IDE internal JavaScript debugger",
         "hiddenWhen": "true",
         "languages": [
           "javascript",