AAE-45391 Lazy loading and improvements for pdfJS (#11869)

* [AAE-45391] - Lazy loading some of the big external libs

* [AAE-45391] - Added some extra units to pdfjs viewer

* [AAE-45391] - Some improement on viewer component

* [AAE-45391] - Fixed the way it was redered to a newer angular system

* [AAE-45391] - Fixed the way it was redered to a newer angular system

* [AAE-45391] - fixed schematic

* [AAE-45391] - Added some docs for the schematics as well

* [AAE-37328] - Fixed comment on missing provider

lib/core/schematics/migrations/collection.json

@@ -5,6 +5,11 @@
       "description": "Update alfresco-api imports",
       "version": "7.0.0",
       "factory": "./7_0_0/index#updateAlfrescoApiImports"
+    },
+    "migrate-pdf-viewer-imports": {
+      "description": "Move PDF viewer imports to @alfresco/adf-core/viewer/pdf secondary entrypoint",
+      "version": "9.0.0",
+      "factory": "./9_0_0/index#migratePdfViewerImports"
     }
   },
   "packageJsonUpdates": {