added an buildscript to build packages

bau.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+pwd=$PWD
+rm -rf dist
+for dir in */ ; do
+    if [ -r "$dir/pyproject.toml" ] ; then
+        cd "$dir"
+        hatch build
+        cd "$pwd"
+    fi
+done
+hatch publish -r sebastian