platform: modularize api/gui, add docs-tests-web foundation, and refresh root config

selective-vpn-gui/controllers/trace_controller.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+from .views import TraceMode
+from api_client import TraceDump
+
+
+class TraceControllerMixin:
+    # -------- Trace --------
+
+    def trace_view(self, mode: TraceMode = "full") -> TraceDump:
+        return self.client.trace_get(mode)