GitHub Actions did not check failure in run.bat.

I just noticed a build problem in the Kotlin code
was detected by GitHub Actions in Linux and Mac OS,
but not in Windows. It marked the Windows test as
a success, even though the output clearly shows that
run.bat failed. I theorize that the steps inside
the file .github/workflows/astronomy-engine-tests.yml
are not being checked for errors after each step, but
only after all of them execute. So I have moved them
into a new batch file generate/commit_hook.bat, which
does check each step.

After pushing this change, all 3 builds should fail.
Once I get Windows to fail also, I will fix the failure.

.github/workflows/astronomy-engine-tests.yml

@@ -97,6 +97,4 @@ jobs:
       shell: cmd
       run: |
         cd generate
-        del output\vsop*.txt output\*.eph output\jupiter_moons.txt
-        call run.bat
-        call verify_clean.bat
+        call commit_hook.bat

generate/commit_hook.bat

@@ -0,0 +1,7 @@
+@echo off
+del output\vsop*.txt output\*.eph output\jupiter_moons.txt
+call run.bat
+if errorlevel 1 (exit /b 1)
+call verify_clean.bat
+if errorlevel 1 (exit /b 1)
+exit /b 0