Add GitHub CODEOWNERS (#4574)

* Add Code owners

* Add some more code owners

.github/CODEOWNERS

@@ -0,0 +1,27 @@
+# See for instructions on this file https://help.github.com/articles/about-codeowners/
+
+*help.py @sptramer
+
+/tools/ @troydai @derekbekoe
+/scripts/ @troydai @derekbekoe
+/packaged_releases/ @derekbekoe
+/src/azure-cli-testsdk/ @troydai
+/src/command_modules/azure-cli-acr/ @djyou
+/src/command_modules/azure-cli-acs/ @rjtsdl
+/src/command_modules/azure-cli-appservice/ @yugangw-msft
+/src/command_modules/azure-cli-backup/ @dragonfly91
+/src/command_modules/azure-cli-batch/ @annatisch 
+/src/command_modules/azure-cli-cdn/ @tjprescott
+/src/command_modules/azure-cli-cosmosdb/ @dmakwana
+/src/command_modules/azure-cli-cloud/ @derekbekoe
+/src/command_modules/azure-cli-container/ @yolo3301
+/src/command_modules/azure-cli-eventgrid/ @kalyanaj
+/src/command_modules/azure-cli-extension/ @derekbekoe
+/src/command_modules/azure-cli-keyvault/ @tjprescott
+/src/command_modules/azure-cli-monitor/ @troydai
+/src/command_modules/azure-cli-network/ @tjprescott
+/src/command_modules/azure-cli-profile/ @yugangw-msft
+/src/command_modules/azure-cli-storage/ @troydai
+/src/command_modules/azure-cli-servicefabric/ @QingChenmsft
+/src/command_modules/azure-cli-sql/ @jaredmoo
+/src/command_modules/azure-cli-vm/ @yugangw-msft