refactor(gui): rebuild the client loading kernel as dsh-client-modules with a two-phase boot

The module system moves out of dsh-client-runtime (./loader retired) into
its own package: a lazy CJS table where executing a bundle only registers
its factory and materialization happens at first require, memoized, with
recursive requires self-ordering. ClientModuleSystem is a class; index.ts
keeps the types and a thin factory. Boot is two-phase: phase one prefetches
the immediately tier in parallel (registration only, failures deferred to
phase two's loud import); phase two mounts the vendored Loader with the
module system as internal, creates one entry per graph row plus the
app-shell pseudo-row the kernel appends itself, and settles on an
all-ACTIVE sweep. The shell kernel is self-sufficient: hand-rolled
loader-status stores, no plugin value imports, platform seed list single-
sourced in platform.ts.

packages/client/web/tsconfig.json

@@ -11,6 +11,12 @@
     {
       "path": "../../../vendor/cordis"
     },
+    {
+      "path": "../../../vendor/loader"
+    },
+    {
+      "path": "../modules"
+    },
     {
       "path": "../ui-slots"
     },
@@ -20,18 +26,9 @@
     {
       "path": "../web-react"
     },
-    {
-      "path": "../connection"
-    },
     {
       "path": "../runtime"
     },
-    {
-      "path": "../ui-theme"
-    },
-    {
-      "path": "../ui-layout"
-    },
     {
       "path": "../../support/invariants"
     }