Added BUILD file for gui2-fw-lib bazel build

This is another step along the way of having Native Bazel builds for Angular
Not fully there yet - waiting for Angular v9 in next 2 weeks
but don't want to wait that long to merge all of this

For most people the main concern is updates to WORKSPACE

Change-Id: I28170b8f8daaa2959327c259fe6a10df075113bb
diff --git a/web/gui2/.gitignore b/web/gui2/.gitignore
index 3f98ae9..e724aee 100644
--- a/web/gui2/.gitignore
+++ b/web/gui2/.gitignore
@@ -3,3 +3,7 @@
 dist/
 coverage/
 src/main/webapp/app/fw/
+
+.pki/
+.cache/
+.npm/