feat: add teawie

drawn by sympathytea (https://github.com/SympathyTea)

Signed-off-by: seth <getchoo@tuta.io>

launcher/resources/backgrounds/backgrounds.qrc

@@ -13,5 +13,6 @@
         <file alias="rory-flat-xmas">rory-flat-xmas.png</file>
         <file alias="rory-flat-bday">rory-flat-bday.png</file>
         <file alias="rory-flat-spooky">rory-flat-spooky.png</file>
+        <file alias="teawie">teawie.png</file>
     </qresource>
 </RCC>

launcher/ui/pages/global/LauncherPage.cpp

@@ -351,6 +351,9 @@ void LauncherPage::applySettings()
     case 2: // rory the cat flat edition
         s->set("BackgroundCat", "rory-flat");
         break;
+    case 3: // teawie
+        s->set("BackgroundCat", "teawie");
+        break;
     }
 
     s->set("MenuBarInsteadOfToolBar", ui->preferMenuBarCheckBox->isChecked());
@@ -424,6 +427,8 @@ void LauncherPage::loadSettings()
         ui->themeBackgroundCat->setCurrentIndex(1);
     } else if (cat == "rory-flat") {
         ui->themeBackgroundCat->setCurrentIndex(2);
+    } else if (cat == "teawie") {
+        ui->themeBackgroundCat->setCurrentIndex(3);
     }
 
     {

launcher/ui/pages/global/LauncherPage.ui

@@ -386,6 +386,11 @@
               <string>Rory ID 11 (flat edition, drawn by Ashtaka)</string>
              </property>
             </item>
+            <item>
+              <property name="text">
+                <string>Teawie (drawn by SympathyTea)</string>
+              </property>
+            </item>
            </widget>
           </item>
          </layout>