Added selectable container that can be focused with keyboard shortcut.

components/terminal_panel.tscn

@@ -0,0 +1,26 @@
+[gd_scene format=3 uid="uid://chflnxm5486kc"]
+
+[ext_resource type="PackedScene" uid="uid://s7f003dyd60i" path="res://components/selectable_container.tscn" id="1_panel"]
+[ext_resource type="Script" uid="uid://cjghwf3b858xu" path="res://scripts/terminal_panel.gd" id="2_terminal"]
+
+[node name="TerminalPanel" unique_id=690518475 instance=ExtResource("1_panel")]
+script = ExtResource("2_terminal")
+title = "ROV terminal"
+initial_focus = NodePath("Command")
+
+[node name="Label" parent="MarginContainer/VBoxContainer/HBoxContainer" parent_id_path=PackedInt32Array(157590431) index="0" unique_id=1765103253]
+text = "ROV terminal"
+
+[node name="Output" type="RichTextLabel" parent="." index="2" unique_id=1341181181]
+custom_minimum_size = Vector2(260, 100)
+layout_mode = 2
+size_flags_vertical = 3
+focus_mode = 2
+text = "SSH transport not connected.
+Press the panel shortcut, then type a command.
+"
+scroll_following = true
+
+[node name="Command" type="LineEdit" parent="." index="3" unique_id=701067863]
+layout_mode = 2
+placeholder_text = "Enter command…"