add main menu and scene manager

core/main_menu/assets/photo_2025-08-27_17-35-14.jpg.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b1wg4lif82dxp"
+path="res://.godot/imported/photo_2025-08-27_17-35-14.jpg-78d5e1b9cf2d920968331a684da2ca42.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://core/main_menu/assets/photo_2025-08-27_17-35-14.jpg"
+dest_files=["res://.godot/imported/photo_2025-08-27_17-35-14.jpg-78d5e1b9cf2d920968331a684da2ca42.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/uastc_level=0
+compress/rdo_quality_loss=0.0
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/channel_remap/red=0
+process/channel_remap/green=1
+process/channel_remap/blue=2
+process/channel_remap/alpha=3
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

core/main_menu/main_menu.gd

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+extends Control
+
+@onready var settings_menu: Control = $%SettingsMenu
+
+func _on_play_button_on_button_pressed() -> void:
+	SceneManager.change_scene(SceneConfig.SceneName.GAME)
+
+
+func _on_settings_button_on_button_pressed() -> void:
+	$%SettingsMenu.visible = !$%SettingsMenu.visible

core/main_menu/main_menu.gd.uid

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+uid://csqxuftsnv1br

core/main_menu/main_menu.tscn

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+[gd_scene format=3 uid="uid://btcpge7cj2041"]
+
+[ext_resource type="Script" uid="uid://csqxuftsnv1br" path="res://core/main_menu/main_menu.gd" id="1_g1whv"]
+[ext_resource type="PackedScene" uid="uid://cxf8s80ivwj1p" path="res://core/game_menu/option_menu.tscn" id="1_uvy4f"]
+[ext_resource type="Texture2D" uid="uid://b1wg4lif82dxp" path="res://core/main_menu/assets/photo_2025-08-27_17-35-14.jpg" id="2_mloc8"]
+[ext_resource type="PackedScene" uid="uid://caqf471x0kttc" path="res://core/game_menu/settings_menu.tscn" id="3_26agx"]
+
+[node name="MainMenu" type="Control" unique_id=889720172]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_g1whv")
+
+[node name="TextureRect" type="TextureRect" parent="." unique_id=11805511]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+texture = ExtResource("2_mloc8")
+
+[node name="OptionMenu" parent="." unique_id=1055457221 instance=ExtResource("1_uvy4f")]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = 492.0
+offset_top = 274.0
+offset_right = 492.0
+offset_bottom = 274.0
+
+[node name="VBoxContainer" parent="OptionMenu" index="0" unique_id=508055524]
+anchor_top = 0.3037037
+anchor_bottom = 0.6962963
+offset_top = 6.0
+offset_bottom = -6.0
+
+[node name="ResumeButton" parent="OptionMenu/VBoxContainer" index="1" unique_id=635721927]
+visible = false
+
+[node name="SaveButton" parent="OptionMenu/VBoxContainer" index="3" unique_id=1161034414]
+visible = false
+
+[node name="SettingsMenu" parent="." unique_id=1639777294 instance=ExtResource("3_26agx")]
+unique_name_in_owner = true
+visible = false
+layout_mode = 1
+offset_left = 639.0
+offset_top = 566.0
+offset_right = 639.0
+offset_bottom = 566.0
+
+[connection signal="on_button_pressed" from="OptionMenu/VBoxContainer/PlayButton" to="." method="_on_play_button_on_button_pressed"]
+[connection signal="on_button_pressed" from="OptionMenu/VBoxContainer/SettingsButton" to="." method="_on_settings_button_on_button_pressed"]
+
+[editable path="OptionMenu"]