Import dyad repository as a git submodule at third_party/dyad

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "third_party/dyad"]
+	path = third_party/dyad
+	url = https://github.com/dyad-sh/dyad.git

NOTICE

@@ -0,0 +1,10 @@
+Third-Party Code Notices
+=========================
+
+This repository includes the following third-party components:
+
+1. dyad
+   Source: https://github.com/dyad-sh/dyad.git
+   Location: third_party/dyad
+   License: Apache License 2.0
+   License File: third_party/dyad/LICENSE

README.md

@@ -1 +1,21 @@
-# saas
+# saas
+
+## Third-Party Dependencies
+
+This repository includes the following external code as a git submodule:
+
+### dyad
+
+- **Location:** `third_party/dyad`
+- **Source:** https://github.com/dyad-sh/dyad.git
+- **License:** Apache License 2.0 (see `third_party/dyad/LICENSE`)
+
+## Getting Started
+
+After cloning this repository, initialize and update all submodules:
+
+```bash
+git submodule update --init --recursive
+```
+
+This will fetch the dyad submodule and any nested submodules it may contain.