Move helpers to submodule (#19)

* add common helpers

* minor changes

* remove from git helpers

* add submodules

* setup 4 version for pester

Co-authored-by: Dmitry Shibanov <v-dmshib@microsoft.com>

config/node-manifest-config.json

@@ -0,0 +1,7 @@
+{
+    "regex": "node-\\d+\\.\\d+\\.\\d+-(\\w+)-(x\\d+)",
+    "groups": {
+        "arch": 2,
+        "platform": 1
+    }
+}