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

Sources/DatabaseClient/Interface.swift

@@ -0,0 +1,30 @@
+import Dependencies
+import DependenciesMacros
+import FluentKit
+
+public extension DependencyValues {
+  var database: DatabaseClient {
+    get { self[DatabaseClient.self] }
+    set { self[DatabaseClient.self] = newValue }
+  }
+}
+
+@DependencyClient
+public struct DatabaseClient: Sendable {
+  public var employees: Employees
+  public var migrations: @Sendable () async throws -> [any AsyncMigration]
+  public var purchaseOrders: PurchaseOrders
+  public var users: Users
+  public var vendorBranches: VendorBranches
+  public var vendors: Vendors
+}
+
+extension DatabaseClient: TestDependencyKey {
+  public static let testValue: DatabaseClient = Self(
+    employees: .testValue,
+    purchaseOrders: .testValue,
+    users: .testValue,
+    vendorBranches: .testValue,
+    vendors: .testValue
+  )
+}