Add swift package for overrides

Author: simolus3

.gitignore

@@ -9,3 +9,4 @@ target/
 *.tar.gz
 *.tar.xz
 *.zip
+.build

Package.swift

@@ -0,0 +1,26 @@
+// swift-tools-version: 5.7
+
+// NOTE! This is never released, we're only using this to support local builds builds for the
+// Swift SDK.
+import PackageDescription
+let packageName = "PowerSyncSQLiteCore"
+
+let package = Package(
+    name: packageName,
+    platforms: [
+        .iOS(.v13),
+        .macOS(.v10_15),
+        .watchOS(.v9)
+    ],
+    products: [
+        .library(
+            name: packageName,
+            targets: [packageName]),
+    ],
+    targets: [
+        .binaryTarget(
+            name: packageName,
+            path: "powersync-sqlite-core.xcframework"
+        )
+    ]
+)