Added light theme

I18N Commander/App/theme/panel/l_style_box_flat.tres

@@ -0,0 +1,4 @@
+[gd_resource type="StyleBoxFlat" format=3 uid="uid://b2nkgvg40j6tc"]
+
+[resource]
+bg_color = Color(0.780392, 0.780392, 0.780392, 1)

I18N Commander/App/theme/ui_theme_light.tres

@@ -0,0 +1,18 @@
+[gd_resource type="Theme" load_steps=2 format=3 uid="uid://w3bmkb0q753m"]
+
+[ext_resource type="StyleBox" uid="uid://b2nkgvg40j6tc" path="res://theme/panel/l_style_box_flat.tres" id="1_87qhj"]
+
+[resource]
+Button/constants/h_separation = 6
+Button/font_sizes/font_size = 32
+CheckBox/constants/h_separation = 16
+CheckBox/font_sizes/font_size = 32
+CheckButton/font_sizes/font_size = 32
+Label/font_sizes/font_size = 32
+LineEdit/font_sizes/font_size = 32
+Panel/styles/panel = ExtResource("1_87qhj")
+PopupMenu/font_sizes/font_separator_size = 32
+PopupMenu/font_sizes/font_size = 32
+TabBar/font_sizes/font_size = 32
+TabContainer/font_sizes/font_size = 32
+TextEdit/font_sizes/font_size = 32