Update examples

• Remove outdated example.
• Update project structure - remove root workspace.
• App messenger example.
• Update README.md.

ElixxirDAppsSDK.xcworkspace/xcshareddata/swiftpm/Package.resolved

 {
   "pins" : [
-    {
-      "identity" : "combine-schedulers",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/pointfreeco/combine-schedulers",
-      "state" : {
-        "revision" : "8fee20f993e64bbbf22bc3e3f444758ac2d05692",
-        "version" : "0.7.2"
-      }
-    },
     {
       "identity" : "keychainaccess",
       "kind" : "remoteSourceControl",
@@ -18,42 +9,6 @@
         "version" : "4.2.2"
       }
     },
-    {
-      "identity" : "swift-case-paths",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/pointfreeco/swift-case-paths",
-      "state" : {
-        "revision" : "a09839348486db8866f85a727b8550be1d671c50",
-        "version" : "0.9.1"
-      }
-    },
-    {
-      "identity" : "swift-collections",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/apple/swift-collections",
-      "state" : {
-        "revision" : "48254824bb4248676bf7ce56014ff57b142b77eb",
-        "version" : "1.0.2"
-      }
-    },
-    {
-      "identity" : "swift-composable-architecture",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/pointfreeco/swift-composable-architecture.git",
-      "state" : {
-        "revision" : "108e3a536fcebb16c4f247ef92c2d7326baf9fe3",
-        "version" : "0.39.0"
-      }
-    },
-    {
-      "identity" : "swift-composable-presentation",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/darrarski/swift-composable-presentation.git",
-      "state" : {
-        "revision" : "1f4d17fae1f7ed41cbed17929083190fd9a78ee6",
-        "version" : "0.5.2"
-      }
-    },
     {
       "identity" : "swift-custom-dump",
       "kind" : "remoteSourceControl",
@@ -63,24 +18,6 @@
         "version" : "0.5.0"
       }
     },
-    {
-      "identity" : "swift-identified-collections",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/pointfreeco/swift-identified-collections",
-      "state" : {
-        "revision" : "2d6b7ffcc67afd9077fac5e5a29bcd6d39b71076",
-        "version" : "0.4.0"
-      }
-    },
-    {
-      "identity" : "swiftui-app-icon-creator",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/darrarski/swiftui-app-icon-creator.git",
-      "state" : {
-        "revision" : "f0c7ba4e66d3dc8135ccf9146afc05f9dff3c4ff",
-        "version" : "1.2.0"
-      }
-    },
     {
       "identity" : "xctest-dynamic-overlay",
       "kind" : "remoteSourceControl",