Create README.md for AUTO plugin (#14861)

* Create README.md for AUTO plugin

* link to contribuation guidance

* Update README.md according to developer documentation guidance

* Update for comments

* Update components for review comments

* Update folder for review comments

* update for wording

* update for comments

src/plugins/auto/docs/architecture.md

@@ -0,0 +1,8 @@
+# AUTO Plugin Architecture
+
+TBD-100527
+
+## See also
+ * [AUTO Plugin README](../README.md)
+ * [OpenVINO™ README](../../../../README.md)
+ * [Developer documentation](../../../../docs/dev/index.md)