Merge remote-tracking branch 'origin/master' into feat/web-message-feedback-ui

Adapt to two contract changes master introduced:

- The generated Remote face now wraps every business result in
  RemoteResult, folding carrier failures into an ok:false branch instead
  of rejecting. The controller reads that envelope at its three call
  sites and maps a carrier failure onto the same settled shape the
  controls already render; three specs cover the new branch.
- Client packages split their tsconfig into host and client halves, and
  the host aggregate now compiles any test not named *.client.spec.*.
  Rename this package's specs to the client convention and drop the
  ../connection project reference, which pointed at a solution file that
  no longer carries the client sources.

Keep master's mount loop with its rollback-on-failure in api-remotes and
add messageFeedbackRemote to it.

packages/client/ui-command/tsconfig.json

@@ -9,10 +9,10 @@
   ],
   "references": [
     {
-      "path": "../../../vendor/cordis"
+      "path": "../../api/remotes/tsconfig.client.json"
     },
     {
-      "path": "../connection"
+      "path": "../../../vendor/cordis"
     },
     {
       "path": "../locale"
@@ -32,6 +32,9 @@
     {
       "path": "../ui-slots"
     },
+    {
+      "path": "../../interaction/commands"
+    },
     {
       "path": "../../support/invariants"
     },