Add OMP as a built-in importable provider (#1388)

* Support imports from Pi-compatible providers

* Add OMP as a built-in provider

* Address Pi session scanner review

* Restore Pi session import discovery

* Update provider test for disabled OMP

packages/app/src/utils/provider-command-templates.ts

@@ -20,6 +20,9 @@ export const PROVIDER_COMMAND_TEMPLATES: Record<
   pi: {
     resume: "pi --session {sessionId}",
   },
+  omp: {
+    resume: "omp --session {sessionId}",
+  },
   opencode: {
     resume: "opencode --session {sessionId}",
   },