Add ObjectStore source

scripts/test.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -eu
+cd "$(dirname "$0")/.."
+mkdir -p out/classes
+javac --release 21 --add-modules jdk.httpserver,java.net.http -d out/classes \
+  src/cloud/lunarsky/store/*.java test/cloud/lunarsky/store/*.java
+java --add-modules jdk.httpserver -cp out/classes cloud.lunarsky.store.StoreTest
+java --add-modules jdk.httpserver,java.net.http -cp out/classes cloud.lunarsky.store.HttpTest