Use local svgo.cmd wrapper binary

Switch SVG optimizer resolution from bin/svgo-cli.exe to bin/svgo.cmd.

Update unit tests to validate the new local binary path behavior.

Co-Authored-By: Abacus.AI CLI <agent@abacus.ai>

bin/svgo-client/package.json

@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "svgo": "^4.0.1"
+  },
+  "type":"module"
+}