Allow runtimeExecutable to be set globally

[raulfpl]

There should be a way to set the runtimeExecutable as a user config for the extension. That way you could set it up once instead of doing it for every new project, in case you don't have Chrome installed to one of the default paths.

[connor4312]

This can now be done via the debug.javascript.defaultRuntimeExecutable setting. Note that this happens at config resolution time, so for the moment only works with pwa- prefixed configs (e.g. if you have a launch type named node, then rename it to pwa-node)

[jtsom]

Just FYI... I added this

    "debug.javascript.defaultRuntimeExecutable": {
      "pwa-node": "node",
      "pwa-chrome": "dev"
    }

to my settings and that launched my Dev Chrome BlazorWasm application just fine.

Thanks!