feat(sdk): add developer project tooling

docs(rfc): propose SDK developer project tooling

feat: rename / docs

ci: fix windows gates

docs: revert

packages/sdk/scripts/src/dev/tsdown-config.ts

@@ -0,0 +1,7 @@
+/**
+ * Generated-project tsdown config wrappers.
+ *
+ * @module @deepseek-ai/dsh-scripts/dev/tsdown-config
+ */
+
+export { PluginBuild, ProjectBuild } from '../build.ts'