Add GitHub action for CI

Change-Id: I855ae2c78e0346393270bdce54c637f741dd138b
diff --git a/.gitignore b/.gitignore
index 4d0f9c2..417d50c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,6 +28,7 @@
 *.tmp
 *.cache
 .*
+!.github
 !.gitignore
 
 # Protected checks