[ DWDS ] Refactor AppInspector to support both Chrome and Web Socket connections (#2700)

Created two new subclasses of `AppInspector`: `ChromeAppInspector` and
`WebSocketAppInspector`. Functionality that doesn't require knowledge of
the specific DWDS connection mode (e.g., WIP vs WS) remains in the now
abstract `AppInspector`, and functionality specific to the connection
mode is now implemented in the respective `*AppInspector` subclass.

This allows for sharing logic around maintaining caches for scripts and
libraries.

Author: bkonyi

dwds/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 26.2.0
+
+- Add support for more service APIs over websocket connections with no Chrome Debugger available.
+
 ## 26.1.0
 
 - `reloadSources` and `hotRestart` now throw an RPC error with `kServerError` code when `NoClientsAvailableException` is caught (no browser clients are connected), allowing tooling to detect and handle this scenario.