Convert all VisualShaders to plain Shaders; clean editor noise

Godot 4 emits two unavoidable warnings every time it reconstructs a
Godot-3-authored VisualShader graph: 'graph_offset property is
deprecated' (the editor's pan position, removed in 4.x) and
'connect_nodes_forced: Index p_from_port = 1 is out of bounds'
(node-graph ports that no longer line up). The compiled GLSL inside
each ShaderMaterial is correct; only the graph reconstruction is
broken.

scripts/devisualize_shaders.gd walks every .material, .tres, and
.mesh under res:// and replaces ShaderMaterial.shader from
VisualShader to a plain Shader carrying the same .code. 15 materials
converted (font outline, dissolve, color tints, book/candle/godet/
growler/parchment/rock-floor/stool/table). Godot now loads the
compiled shader directly with no graph reconstruction → both
warnings gone, rendering identical.

Also:
- scripts/resave_scenes.gd: load + re-save every .tscn so inline
  ArrayMesh sub-resources (notably WarCraft.tscn::17, the baked
  floor) move from Godot-3 PoolByteArray to Godot-4 PackedByteArray
  surface format. Silences 'Mesh uses old surface format'.
- scripts/find_visualshaders.gd: companion audit tool that lists
  every Resource still backed by a VisualShader. Useful if new
  legacy materials get added.
- Drop the now-orphan inline VisualShader / ShaderMaterial sub-
  resources (id 1..17) from Summary.tscn. The PanelWood lost its
  screen-blend tint material; a plain Panel renders fine and the
  effect can be re-authored as a hand-written shader if wanted.
- Add releases/.gdignore and tighten .gitignore so Godot stops
  warning 'Detected another project.godot at res://releases'. The
  releases/ directory has its own placeholder project.godot which
  Godot would otherwise flag at every editor open.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scenes/UI/loading/Loading.tscn

@@ -1,30 +1,32 @@
-[gd_scene load_steps=5 format=2]
+[gd_scene format=3]
 
-[ext_resource path="res://scenes/UI/loading/parts/LoadingBare.tscn" type="PackedScene" id=1]
-[ext_resource path="res://scenes/UI/loading/parts/TopPart.tscn" type="PackedScene" id=2]
-[ext_resource path="res://scenes/UI/background/Background.tscn" type="PackedScene" id=3]
+[ext_resource type="PackedScene" path="res://scenes/UI/loading/parts/LoadingBare.tscn" id="1"]
+[ext_resource type="PackedScene" path="res://scenes/UI/loading/parts/TopPart.tscn" id="2"]
+[ext_resource type="PackedScene" path="res://scenes/UI/background/Background.tscn" id="3"]
 
-[sub_resource type="Animation" id=1]
+[sub_resource type="Animation" id="1"]
 resource_name = "BorderAnim"
 tracks/0/type = "bezier"
+tracks/0/imported = false
+tracks/0/enabled = true
 tracks/0/path = NodePath("LoadingTopBorder:position:y")
 tracks/0/interp = 1
 tracks/0/loop_wrap = true
-tracks/0/imported = false
-tracks/0/enabled = true
 tracks/0/keys = {
-"points": PackedFloat32Array( -768, -0.25, 0, 1.01154, 306.838, -160.174, -1.02203, -283.071, 0.439946, 60.9141, -27.6065, -0.45336, -19.562, 0.536352, 17.1993, 0.362091, -0.538766, -0.968613, 0.25, 0 ),
-"times": PackedFloat32Array( 0.1, 0.3, 0.6, 0.9 )
+"handle_modes": PackedInt32Array(0, 0, 0, 0),
+"points": PackedFloat32Array(-768, -0.25, 0, 1.01154, 306.838, -160.174, -1.02203, -283.071, 0.439946, 60.9141, -27.6065, -0.45336, -19.562, 0.536352, 17.1993, 0.362091, -0.538766, -0.968613, 0.25, 0),
+"times": PackedFloat32Array(0.1, 0.3, 0.6, 0.9)
 }
 tracks/1/type = "bezier"
+tracks/1/imported = false
+tracks/1/enabled = true
 tracks/1/path = NodePath("LoadingBare:modulate:a")
 tracks/1/interp = 1
 tracks/1/loop_wrap = true
-tracks/1/imported = false
-tracks/1/enabled = true
 tracks/1/keys = {
-"points": PackedFloat32Array( 0, -0.25, 0, 1.10651, 0.716757, 1, -1.59408, -0.0328361, 0.25, 0 ),
-"times": PackedFloat32Array( 0, 0.4 )
+"handle_modes": PackedInt32Array(0, 0),
+"points": PackedFloat32Array(0, -0.25, 0, 1.10651, 0.716757, 1, -1.59408, -0.0328361, 0.25, 0),
+"times": PackedFloat32Array(0, 0.4)
 }
 
 [node name="Control" type="Control"]
@@ -34,19 +36,19 @@ __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="BackgroundPicture" parent="." instance=ExtResource( 3 )]
+[node name="BackgroundPicture" parent="." instance=ExtResource("3")]
 layout_mode = 1
 anchors_preset = 15
 anchor_right = 1.0
 anchor_bottom = 1.0
 
-[node name="LoadingTopBorder" parent="." instance=ExtResource( 2 )]
+[node name="LoadingTopBorder" parent="." instance=ExtResource("2")]
 offset_top = 0.362091
 offset_bottom = 0.362061
 
-[node name="LoadingBare" parent="." instance=ExtResource( 1 )]
+[node name="LoadingBare" parent="." instance=ExtResource("1")]
 offset_top = 360.0
 
 [node name="AnimLoading" type="AnimationPlayer" parent="."]
 method_call_mode = 1
-anims/BorderAnim = SubResource( 1 )
+anims/BorderAnim = SubResource("1")