remove projects and apps end to end

deletes the last of the projects/apps cluster: the published-app store
(/api/apps + /api/app-serve), the project dev-server and its websocket
proxy (/api/dev-server + /api/dev-server-proxy), the shared html-rewrite
they were the only consumers of, and their frontend — the Preview panel,
the UserApp panel/header, useUserApps and the /settings/apps screen.

also drops getUserProjectsDir and getUserAppsDir, the ProjectType and
ProjectDefinition types, and the 'dev-server' websocket provider from
server.tsx. nothing on disk is touched.

1440 deletions, 31 insertions. tsgo clean.

src/apps/officer-web/App.tsx

@@ -34,7 +34,6 @@ export function App() {
             <Route path="/settings/ai" element={<Dashboard.AISettings />} />
             <Route path="/settings/system" element={<Dashboard.SystemSettings />} />
             <Route path="/settings/integrations" element={<Dashboard.IntegrationsSettings />} />
-            <Route path="/settings/apps" element={<Dashboard.AppsSettings />} />
             <Route path="/chat" element={<Dashboard.SessionListPage />} />
             <Route path="/chat/new" element={<Dashboard.SessionListPage isNew />} />
             <Route path="/chat/:sessionId" element={<Dashboard.SessionListPage />} />