WIP: Add GRDB demo app

Author: stevensJourney

Demo/GRDB Demo/GRDB Demo.xcodeproj/project.pbxproj

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Demo/GRDB Demo/GRDB Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "tinted"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "512x512"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "512x512"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Demo/GRDB Demo/GRDB Demo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Demo/GRDB Demo/GRDB Demo/Assets.xcassets/AccentColor.colorset/Contents.json

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+{
+  "images" : [
+    {
+      "filename" : "pslogo.svg",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Demo/GRDB Demo/GRDB Demo/Assets.xcassets/AppIcon.appiconset/Contents.json

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+import GRDB
+import PowerSync
+
+/// PowerSync client side schema
+let listsTable = Table(
+    name: "lists",
+    columns: [
+        .text("name"),
+        .text("owner_id")
+    ]
+)
+
+struct List: Codable, Equatable, Identifiable, FetchableRecord, PersistableRecord {
+    var id: String
+    var name: String
+    var ownerId: String
+
+    static var databaseTableName = "lists"
+
+    
+    enum CodingKeys: String, CodingKey {
+        case id
+        case name
+        case ownerId = "owner_id"
+    }
+    
+    enum Columns {
+        static let id = Column(CodingKeys.id)
+        static let name = Column(CodingKeys.name)
+        static let ownerId = Column(CodingKeys.ownerId)
+    }
+
+    static let todos = hasMany(
+        Todo.self, key: "todos",
+        using: ForeignKey([Todo.Columns.listId], to: [Columns.id])
+    )
+}
+
+/// Result for displaying lists in the main view
+struct ListWithTodoCounts: Decodable, Hashable, Identifiable, FetchableRecord {
+    var id: String
+    var name: String
+    var pendingCount: Int
+}

Demo/GRDB Demo/GRDB Demo/Assets.xcassets/Contents.json

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+import Foundation
+import GRDB
+import PowerSync
+
+/// PowerSync client side schema
+let todosTable = Table(
+    name: "todos",
+    columns: [
+        .text("name"),
+        .text("list_id"),
+        // Conversion should automatically be handled by GRDB
+        .integer("completed"),
+        .text("completed_at")
+    ]
+)
+
+struct Todo: Codable, Equatable, Identifiable, FetchableRecord, PersistableRecord {
+    var id: String
+    var name: String
+    var listId: String
+    var isCompleted: Bool
+    var completedAt: Date?
+
+    static var databaseTableName = "todos"
+
+    enum CodingKeys: String, CodingKey {
+        case id
+        case name
+        case listId = "list_id"
+        case isCompleted = "completed"
+        case completedAt = "completed_at"
+    }
+
+    enum Columns {
+        static let id = Column(CodingKeys.id)
+        static let name = Column(CodingKeys.name)
+        static let listId = Column(CodingKeys.listId)
+        static let isCompleted = Column(CodingKeys.isCompleted)
+        static let completedAt = Column(CodingKeys.completedAt)
+    }
+}