add fullscreen mode

pubspec.lock

@@ -150,6 +150,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.9.8"
+  flutter_fullscreen:
+    dependency: "direct main"
+    description:
+      name: flutter_fullscreen
+      sha256: "37fc83866ded6477efdd5653bed3a6edaaa831dada48a3ca58b2395ce1cc282f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
   flutter_launcher_icons:
     dependency: "direct main"
     description:
@@ -504,6 +512,46 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.28.0"
+  screen_retriever:
+    dependency: transitive
+    description:
+      name: screen_retriever
+      sha256: "570dbc8e4f70bac451e0efc9c9bb19fa2d6799a11e6ef04f946d7886d2e23d0c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  screen_retriever_linux:
+    dependency: transitive
+    description:
+      name: screen_retriever_linux
+      sha256: f7f8120c92ef0784e58491ab664d01efda79a922b025ff286e29aa123ea3dd18
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  screen_retriever_macos:
+    dependency: transitive
+    description:
+      name: screen_retriever_macos
+      sha256: "71f956e65c97315dd661d71f828708bd97b6d358e776f1a30d5aa7d22d78a149"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  screen_retriever_platform_interface:
+    dependency: transitive
+    description:
+      name: screen_retriever_platform_interface
+      sha256: ee197f4581ff0d5608587819af40490748e1e39e648d7680ecf95c05197240c0
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  screen_retriever_windows:
+    dependency: transitive
+    description:
+      name: screen_retriever_windows
+      sha256: "449ee257f03ca98a57288ee526a301a430a344a161f9202b4fcc38576716fe13"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -725,6 +773,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.14.0"
+  window_manager:
+    dependency: transitive
+    description:
+      name: window_manager
+      sha256: "7eb6d6c4164ec08e1bf978d6e733f3cebe792e2a23fb07cbca25c2872bfdbdcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.1"
   xdg_directories:
     dependency: transitive
     description: