Rework custom terminal description and add tilix

app/src/main/java/io/xpipe/app/prefs/AppPrefs.java

@@ -147,7 +147,7 @@ public class AppPrefs {
     // ===============
     private final StringProperty customTerminalCommand = typed(new SimpleStringProperty(""), String.class);
     private final StringField customTerminalCommandControl = editable(
-            StringField.ofStringType(customTerminalCommand).render(() -> new SimpleTextControl()),
+            StringField.ofStringType(customTerminalCommand).placeholder("customTerminalPlaceholder").render(() -> new SimpleTextControl()),
             terminalType.isEqualTo(ExternalTerminalType.CUSTOM));
 
     private final BooleanProperty preferTerminalTabs = typed(new SimpleBooleanProperty(true), Boolean.class);
@@ -208,7 +208,7 @@ public class AppPrefs {
 
     final StringProperty customEditorCommand = typed(new SimpleStringProperty(""), String.class);
     private final StringField customEditorCommandControl = editable(
-            StringField.ofStringType(customEditorCommand).render(() -> new SimpleTextControl()),
+            StringField.ofStringType(customEditorCommand).placeholder("customEditorPlaceholder").render(() -> new SimpleTextControl()),
             externalEditor.isEqualTo(ExternalEditorType.CUSTOM));
     private final IntegerProperty editorReloadTimeout = typed(new SimpleIntegerProperty(1000), Integer.class);
 

app/src/main/java/io/xpipe/app/prefs/ExternalTerminalType.java

@@ -311,6 +311,19 @@ public interface ExternalTerminalType extends PrefsChoiceValue {
         }
     };
 
+    ExternalTerminalType TILIX = new SimplePathType("app.tilix", "tilix") {
+
+        @Override
+        protected CommandBuilder toCommand(String name, String file) {
+            return CommandBuilder.of().add("-t").addQuoted(name).add("-e").addFile(file);
+        }
+
+        @Override
+        public boolean isSelectable() {
+            return OsType.getLocal().equals(OsType.LINUX);
+        }
+    };
+
     ExternalTerminalType TERMINATOR = new SimplePathType("app.terminator", "terminator") {
 
         @Override
@@ -535,6 +548,7 @@ public interface ExternalTerminalType extends PrefsChoiceValue {
                     XFCE,
                     ELEMENTARY,
                     GNOME_TERMINAL,
+                    TILIX,
                     TERMINATOR,
                     KITTY,
                     TERMINOLOGY,