feat(installer): switch installer/docs to use main branch; add automated installer instructions and update CI examples to use the installer; add release registries and access level in npmextra.json

npmextra.json

@@ -1,7 +1,6 @@
 {
   "@ship.zone/szci": {
     "npmGlobalTools": [],
-    "npmAccessLevel": "public",
     "npmRegistryUrl": "registry.npmjs.org"
   },
   "@git.zone/tsdocker": {
@@ -34,6 +33,13 @@
         "continuous integration",
         "continuous deployment"
       ]
+    },
+    "release": {
+      "registries": [
+        "https://verdaccio.lossless.digital",
+        "https://registry.npmjs.org"
+      ],
+      "accessLevel": "public"
     }
   }
-}
+}