feat: implement tool workshop - comprehensive tool system enhancement

- Add Docker Compose and Dockerfile support for tool definitions
- Implement readiness probes with configurable command, timeout, interval
- Create ConfigFolder model for reusable file collections with project overrides
- Add rich tool config fields: port_override, start_command, working_directory, env vars, volumes
- Build unified Tool Workshop UI at /tool-workshop replacing /tool-configs and /tool-types
- Update instance creation to support dockerfile builds, config folder mounting, readiness probes
- Add 3 database migrations for tool_types, tool_configs, and new config_folders table
- Create docker_build.py and readiness_probe.py services
- Add config_folders API with CRUD and project override endpoints

Quality gates: frontend build passes, Python syntax valid, all phases complete

Addresses tool-workshop OpenSpec change

apps/web/src/router.tsx

@@ -14,8 +14,7 @@ import { RepoWorkspace } from "./pages/repo-workspace";
 import { SSHKeysPage } from "./pages/ssh-keys";
 import { SettingsPage } from "./pages/settings";
 import { TerminalPage } from "./pages/terminal";
-import { ToolConfigsPage } from "./pages/tool-configs";
-import { ToolTypesPage } from "./pages/tool-types";
+import { ToolWorkshopPage } from "./pages/tool-workshop";
 
 export const AppRouter = () => {
   return (
@@ -39,8 +38,9 @@ export const AppRouter = () => {
         <Route path="ssh-keys" element={<SSHKeysPage />} />
         <Route path="profile" element={<ProfilePage />} />
         <Route path="settings" element={<SettingsPage />} />
-        <Route path="tool-types" element={<ToolTypesPage />} />
-        <Route path="tool-configs" element={<ToolConfigsPage />} />
+        <Route path="tool-workshop" element={<ToolWorkshopPage />} />
+        <Route path="tool-types" element={<Navigate to="/tool-workshop" replace />} />
+        <Route path="tool-configs" element={<Navigate to="/tool-workshop" replace />} />
         <Route path="instances/:instanceId/terminal" element={<TerminalPage />} />
       </Route>
       <Route path="/404" element={<NotFoundPage />} />