Create a sample app for Combine backed worker

Author: soorinpark

Diff for: Package.swift

@@ -71,16 +71,6 @@ let package = Package(
             dependencies: ["Workflow"],
             path: "WorkflowCombine/Sources"
         ),
-        .testTarget(
-            name: "WorkflowCombineTests",
-            dependencies: ["Workflow", "WorkflowCombine", "WorkflowTesting"],
-            path: "WorkflowCombine/Tests"
-        ),
-        .target(
-            name: "WorkflowTesting",
-            dependencies: ["Workflow"],
-            path: "WorkflowTesting/Sources"
-        ),
     ],
     swiftLanguageVersions: [.v5]
 )

Diff for: Samples/WorkflowCombineSampleApp/Podfile

@@ -0,0 +1,9 @@
+project 'WorkflowCombineSampleApp.xcodeproj'
+platform :ios, '13.0'
+
+target 'WorkflowCombineSampleApp' do
+    pod 'Workflow', path: '../../Workflow.podspec', :testspecs => ['Tests']
+    pod 'WorkflowUI', path: '../../WorkflowUI.podspec', :testspecs => ['Tests']
+    pod 'WorkflowCombine', path: '../../WorkflowCombine.podspec'
+    pod 'WorkflowReactiveSwift', path: '../../WorkflowReactiveSwift.podspec', :testspecs => ['Tests']
+end

Diff for: Samples/WorkflowCombineSampleApp/Podfile.lock

@@ -0,0 +1,58 @@
+PODS:
+  - ReactiveSwift (6.3.0)
+  - Workflow (1.0.0-rc.1):
+    - ReactiveSwift (~> 6.3.0)
+  - Workflow/Tests (1.0.0-rc.1):
+    - ReactiveSwift (~> 6.3.0)
+  - WorkflowCombine (1.0.0-rc.1):
+    - Workflow (= 1.0.0-rc.1)
+  - WorkflowReactiveSwift (1.0.0-rc.1):
+    - ReactiveSwift (~> 6.3.0)
+    - Workflow (= 1.0.0-rc.1)
+  - WorkflowReactiveSwift/Tests (1.0.0-rc.1):
+    - ReactiveSwift (~> 6.3.0)
+    - Workflow (= 1.0.0-rc.1)
+    - WorkflowTesting (= 1.0.0-rc.1)
+  - WorkflowTesting (1.0.0-rc.1):
+    - Workflow (= 1.0.0-rc.1)
+  - WorkflowUI (1.0.0-rc.1):
+    - Workflow (= 1.0.0-rc.1)
+  - WorkflowUI/Tests (1.0.0-rc.1):
+    - Workflow (= 1.0.0-rc.1)
+    - WorkflowReactiveSwift (= 1.0.0-rc.1)
+
+DEPENDENCIES:
+  - Workflow (from `../../Workflow.podspec`)
+  - Workflow/Tests (from `../../Workflow.podspec`)
+  - WorkflowCombine (from `../../WorkflowCombine.podspec`)
+  - WorkflowReactiveSwift (from `../../WorkflowReactiveSwift.podspec`)
+  - WorkflowReactiveSwift/Tests (from `../../WorkflowReactiveSwift.podspec`)
+  - WorkflowUI (from `../../WorkflowUI.podspec`)
+  - WorkflowUI/Tests (from `../../WorkflowUI.podspec`)
+
+SPEC REPOS:
+  trunk:
+    - ReactiveSwift
+    - WorkflowTesting
+
+EXTERNAL SOURCES:
+  Workflow:
+    :path: "../../Workflow.podspec"
+  WorkflowCombine:
+    :path: "../../WorkflowCombine.podspec"
+  WorkflowReactiveSwift:
+    :path: "../../WorkflowReactiveSwift.podspec"
+  WorkflowUI:
+    :path: "../../WorkflowUI.podspec"
+
+SPEC CHECKSUMS:
+  ReactiveSwift: 7937f26ec18d555e2a99352bd0a8b2817d1f042d
+  Workflow: e3391755e611eb0e0efc244ef5fa9b12c6e2f8ab
+  WorkflowCombine: 8806745d6023261bfbc34e0d1da753774e9fe0c5
+  WorkflowReactiveSwift: a1854c330a7ea4342e999156e0abe7f216e16d63
+  WorkflowTesting: ff584e427bda8491285deb97db14182925d1e4f4
+  WorkflowUI: 0e3b93590dc2e58a93f300a47e5c8e81b501ef36
+
+PODFILE CHECKSUM: 59f19f06532469f70596f7954b3f8fe590c38ef1
+
+COCOAPODS: 1.9.1