apply core-imports codemod to all packages and plugins

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/config-schema/src/api/StaticSchemaLoader.ts

@@ -14,11 +14,11 @@
  * limitations under the License.
  */
 
-import { Observable } from '@backstage/core';
 import ObservableImpl from 'zen-observable';
 import { ResponseError } from '@backstage/errors';
 import { Schema } from 'jsonschema';
 import { ConfigSchemaApi, ConfigSchemaResult } from './types';
+import { Observable } from '@backstage/core-plugin-api';
 
 const DEFAULT_URL = 'config-schema.json';
 

plugins/config-schema/src/api/types.ts

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-import { createApiRef, Observable } from '@backstage/core';
 import { Schema } from 'jsonschema';
+import { createApiRef, Observable } from '@backstage/core-plugin-api';
 
 export interface ConfigSchemaResult {
   schema?: Schema;

plugins/config-schema/src/components/ConfigSchemaPage/ConfigSchemaPage.tsx

@@ -14,12 +14,14 @@
  * limitations under the License.
  */
 import React, { useMemo } from 'react';
-import { Header, Page, Content, useApi, Progress } from '@backstage/core';
 import { useObservable } from 'react-use';
 import { configSchemaApiRef } from '../../api';
 import { SchemaViewer } from '../SchemaViewer';
 import { Typography } from '@material-ui/core';
 
+import { Header, Page, Content, Progress } from '@backstage/core-components';
+import { useApi } from '@backstage/core-plugin-api';
+
 export const ConfigSchemaPage = () => {
   const configSchemaApi = useApi(configSchemaApiRef);
   const schemaResult = useObservable(

plugins/config-schema/src/plugin.ts

@@ -13,10 +13,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { createPlugin, createRoutableExtension } from '@backstage/core';
-
 import { rootRouteRef } from './routes';
 
+import {
+  createPlugin,
+  createRoutableExtension,
+} from '@backstage/core-plugin-api';
+
 export const configSchemaPlugin = createPlugin({
   id: 'config-schema',
   routes: {

plugins/config-schema/src/routes.ts

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { createRouteRef } from '@backstage/core';
+import { createRouteRef } from '@backstage/core-plugin-api';
 
 export const rootRouteRef = createRouteRef({
   title: 'config-schema',