[PM-328] Move common/importer to libs/importer (tools-migration) (#5060)

* Create and register new libs/importer

Create package.json
Create tsconfig
Create jest.config
Extend shared and root tsconfig and jest.configs
Register with eslint

* Move importer-related files to libs/importer

* Move importer-spec-related files to libs/importer

Move import.service.spec

* Update package-lock.json

* Set CODEOWNERS for new libs/importer

* Register libs/importer with cli and fix imports

* Register libs/importer with web and fix imports

* Move importOption into models

Rename importOptions to import-options

* Fix linting issues after updating prettier

* Only expose necessary files from libs/importer

Fix tsconfig files
- Removes the trailing /index on imports in web/cli

As the spec-files no longer can access the internals via @bitwarden/importer they import by path (../src/importers)

* Add barrel files to vendors with more than one importer

libs/importer/src/services/import.service.abstraction.ts

@@ -0,0 +1,19 @@
+import { Importer } from "../importers/importer";
+import { ImportError } from "../models/import-error";
+import { ImportOption, ImportType } from "../models/import-options";
+
+export abstract class ImportServiceAbstraction {
+  featuredImportOptions: readonly ImportOption[];
+  regularImportOptions: readonly ImportOption[];
+  getImportOptions: () => ImportOption[];
+  import: (
+    importer: Importer,
+    fileContents: string,
+    organizationId?: string
+  ) => Promise<ImportError>;
+  getImporter: (
+    format: ImportType | "bitwardenpasswordprotected",
+    organizationId: string,
+    password?: string
+  ) => Importer;
+}