feat: Fixes build issues, adds ApiController module.

Sources/ApiController/Interface.swift

@@ -0,0 +1,38 @@
+import Dependencies
+import DependenciesMacros
+import Logging
+import ManualDCore
+
+extension DependencyValues {
+  public var apiController: ApiController {
+    get { self[ApiController.self] }
+    set { self[ApiController.self] = newValue }
+  }
+}
+
+@DependencyClient
+public struct ApiController: Sendable {
+  public var json: @Sendable (Request) async throws -> (any Encodable)?
+}
+
+extension ApiController {
+  public struct Request: Sendable {
+    public let route: SiteRoute.Api
+    public let logger: Logger
+
+    public init(route: SiteRoute.Api, logger: Logger) {
+      self.route = route
+      self.logger = logger
+    }
+  }
+}
+
+extension ApiController: DependencyKey {
+  public static let testValue = Self()
+
+  public static let liveValue = Self(
+    json: { request in
+      try await request.route.respond(logger: request.logger)
+    }
+  )
+}