The sdk compiles itself when installed from git

Its entry points all resolve into a compiled directory that is not in source
control, so anything installing it from a clone got a package whose every
export pointed at nothing. npm runs this after a git install; that is what lets
a build with only one repository in front of it depend on this one.

package.json

@@ -14,7 +14,8 @@
   },
   "scripts": {
     "build": "tsc",
-    "test": "node --test --experimental-strip-types 'test/*.test.ts'"
+    "test": "node --test --experimental-strip-types 'test/*.test.ts'",
+    "prepare": "tsc"
   },
   "devDependencies": {
     "@types/node": "^22.0.0",