plugins/tech-radar: migrate to new plugin pattern and avoid using api for config

packages/app/src/App.tsx

@@ -28,6 +28,7 @@ import { hot } from 'react-hot-loader/root';
 import { providers } from './identityProviders';
 import { Router as CatalogRouter } from '@backstage/plugin-catalog';
 import { Router as DocsRouter } from '@backstage/plugin-techdocs';
+import { Router as TechRadarRouter } from '@backstage/plugin-tech-radar';
 import { Route, Routes, Navigate } from 'react-router';
 
 import { EntityPage } from './components/catalog/EntityPage';
@@ -60,6 +61,10 @@ const AppRoutes = () => (
       element={<CatalogRouter EntityPage={EntityPage} />}
     />
     <Route path="/docs/*" element={<DocsRouter />} />
+    <Route
+      path="/tech-radar"
+      element={<TechRadarRouter width={1500} height={800} />}
+    />
     <Navigate key="/" to="/catalog" />
     {...deprecatedAppRoutes}
   </Routes>

packages/app/src/apis.ts

@@ -51,8 +51,6 @@ import {
   LighthouseRestApi,
 } from '@backstage/plugin-lighthouse';
 
-import { techRadarApiRef, TechRadar } from '@backstage/plugin-tech-radar';
-
 import { CircleCIApi, circleCIApiRef } from '@backstage/plugin-circleci';
 import { catalogApiRef, CatalogClient } from '@backstage/plugin-catalog';
 
@@ -182,14 +180,6 @@ export const apis = (config: ConfigApi) => {
     }),
   );
 
-  builder.add(
-    techRadarApiRef,
-    new TechRadar({
-      width: 1500,
-      height: 800,
-    }),
-  );
-
   builder.add(catalogApiRef, new CatalogClient({ discoveryApi }));
 
   builder.add(scaffolderApiRef, new ScaffolderApi({ discoveryApi }));