feat: Begins breaking database out into it's own module, using dependencies

Sources/DatabaseClient/Employees.swift

@@ -0,0 +1,63 @@
+import Dependencies
+import DependenciesMacros
+import SharedModels
+
+public extension DatabaseClient {
+
+  @DependencyClient
+  struct Employees: Sendable {
+    public var create: @Sendable (Employee.Create) async throws -> Employee
+    public var delete: @Sendable (Employee.ID) async throws -> Void
+    public var fetchAll: @Sendable (FetchRequest) async throws -> [Employee]
+    public var get: @Sendable (Employee.ID) async throws -> Employee?
+    public var update: @Sendable (Employee.ID, Employee.Update) async throws -> Employee
+
+    public func fetchAll() async throws -> [Employee] {
+      try await fetchAll(.all)
+    }
+
+    public enum FetchRequest {
+      case active
+      case all
+      case inactive
+    }
+  }
+}
+
+extension DatabaseClient.Employees: TestDependencyKey {
+  public static let testValue = Self()
+}
+
+public extension Employee {
+  struct Create: Codable, Sendable {
+    public let firstName: String
+    public let lastName: String
+    public let active: Bool?
+
+    public init(
+      firstName: String,
+      lastName: String,
+      active: Bool? = nil
+    ) {
+      self.firstName = firstName
+      self.lastName = lastName
+      self.active = active
+    }
+  }
+
+  struct Update: Codable, Sendable {
+    public let firstName: String?
+    public let lastName: String?
+    public let active: Bool?
+
+    public init(
+      firstName: String? = nil,
+      lastName: String? = nil,
+      active: Bool? = nil
+    ) {
+      self.firstName = firstName
+      self.lastName = lastName
+      self.active = active
+    }
+  }
+}