gam-setup.bat file to automate Windows setup

part of #309

src/gam-setup.bat

@@ -0,0 +1,72 @@
+@echo(
+@set /p adminemail= "Please enter your G Suite admin email address: "
+
+:createproject
+@echo(
+@set /p yn= "Are you ready to set up a Google API project for GAM? [y or n] "
+@if /I "%yn%"=="n" (
+@  echo(
+@  echo You can create an API project later by running:
+@  echo(
+@  echo gam create project
+@  goto alldone
+   )
+@if /I not "%yn%"=="y" (
+@  echo(
+@  echo Please answer y or n.
+@  goto createproject
+   )
+@gam create project %adminemail%
+@if not ERRORLEVEL 1 goto projectdone
+@echo(
+@echo Projection creation failed. Trying again. Say n to skip projection creation.
+@goto createproject
+:projectdone
+
+:adminauth
+@echo(
+@set /p yn= "Are you ready to authorize GAM to perform G Suite management operations as your admin account? [y or n] "
+@if /I "%yn%"=="n" (
+@  echo(
+@  echo You can authorize an admin later by running:
+@  echo(
+@  echo gam oauth create %adminemail%
+@  goto admindone
+   )
+@if /I not "%yn%"=="y" (
+@  echo(
+@  echo Please answer y or n.
+@  goto adminauth
+   )
+@gam oauth create %adminemail%
+@if not ERRORLEVEL 1 goto admindone
+@echo(
+@echo Admin authorization failed. Trying again. Say n to skip admin authorization.
+@goto adminauth
+:admindone
+
+:saauth
+@echo(
+@set /p yn= "Are you ready to authorize GAM to manage G Suite user data and settings? [y or n] "
+@if /I "%yn%"=="n" (
+@  echo(
+@  echo You can authorize a service account later by running:
+@  echo(
+@  echo gam user %adminemail% check serviceaccount
+@  goto sadone
+   )
+@if /I not "%yn%"=="y" (
+@  echo(
+@  echo Please answer y or n.
+@  goto saauth
+   )
+@echo Great! Checking service account scopes. This will fail the first time. Follow the steps to authorize and retry. It can take a few minutes for scopes to PASS after they've been authorized in the admin console.
+@gam user %adminemail% check serviceaccount
+@if not ERRORLEVEL 1 goto sadone
+@echo(
+@echo Service account authorization failed. Confirm you entered the scopes correctly in the admin console. It can take a few minutes for scopes to PASS after they are entered in the admin console so if you're sure you entered them correctly, go grab a coffee and then hit Y to try again. Say N to skip admin authorization.
+@goto saauth
+:sadone
+
+echo GAM installation and setup complete!
+:alldone