Add Tuist support and Example project (#224)

Author: Kyle-Ye

.gitignore

@@ -15,3 +15,10 @@ build/
 .ag_repo/
 .oag_repo/
 .claude
+
+# Tuist
+Derived/
+Tuist/.build/
+*.xcodeproj
+*.xcworkspace
+*.xcframework

Example/.gitignore

@@ -0,0 +1,6 @@
+## Tuist generated files
+*.xcodeproj
+*.xcworkspace
+Derived/
+build/
+.build

Example/Project.swift

@@ -0,0 +1,18 @@
+import ProjectDescription
+
+let project = Project(
+    name: "Example",
+    targets: [
+        .target(
+            name: "Example",
+            destinations: [.mac],
+            product: .commandLineTool,
+            bundleId: "org.OpenSwiftUIProject.OpenAttributeGraph.Example",
+            deploymentTargets: .macOS("15.0"),
+            sources: ["Sources/**"],
+            dependencies: [
+                .external(name: "OpenAttributeGraph"),
+            ]
+        ),
+    ]
+)

Example/Sources/main.swift

@@ -0,0 +1,4 @@
+import OpenAttributeGraph
+
+let _ = Graph()
+print("OpenAttributeGraph Example: Graph created successfully")

Example/Tuist.swift

@@ -0,0 +1,5 @@
+import ProjectDescription
+
+let tuist = Tuist(
+    project: .tuist()
+)

Example/Tuist/Package.swift

@@ -0,0 +1,10 @@
+// swift-tools-version: 6.1
+
+import PackageDescription
+
+let package = Package(
+    name: "ExampleDependencies",
+    dependencies: [
+        .package(path: "../../"),
+    ]
+)