terminal works basically. (#12189)

* terminal works basically.
todo:
- persistent
- sessions restore
- web
- mobile

* missed terminal persistent option change

* android sdk 34 -> 35

* +#![cfg_attr(lt_1_77, feature(c_str_literals))]

* fixing ci

* fix ci

* fix ci for android

* try "Fix Android SDK Platform 35"

* fix android 34

* revert flutter_plugin_android_lifecycle to 2.0.17 which used in rustdesk 1.4.0

* refactor, but break something of desktop terminal (new tab showing loading)

* fix connecting...

flutter/pubspec.yaml

@@ -106,6 +106,8 @@ dependencies:
   device_info_plus: ^9.1.0
   qr_flutter: ^4.1.0
   extended_text: 14.0.0
+  xterm: 4.0.0
+  sqflite: 2.2.0
 
 dev_dependencies:
   icons_launcher: ^2.0.4
@@ -118,7 +120,8 @@ dev_dependencies:
 
 dependency_overrides:
   intl: ^0.19.0
-  
+  flutter_plugin_android_lifecycle: 2.0.17
+
 # rerun: flutter pub run flutter_launcher_icons
 flutter_icons:
   image_path: "../res/icon.png"
@@ -193,4 +196,3 @@ flutter:
   #
   # For details regarding fonts from package dependencies,
   # see https://flutter.dev/custom-fonts/#from-packages
-