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/parts/TopPart.tscn

@@ -1,8 +1,8 @@
-[gd_scene load_steps=4 format=2]
+[gd_scene format=3]
 
-[ext_resource path="res://scenes/UI/loading/parts/LabelLoading.tscn" type="PackedScene" id=1]
-[ext_resource path="res://scenes/UI/loading/parts/BorderColor.tscn" type="PackedScene" id=2]
-[ext_resource path="res://assets/ui/themes/bck-hrz-grd.png" type="Texture2D" id=3]
+[ext_resource type="PackedScene" path="res://scenes/UI/loading/parts/LabelLoading.tscn" id="1"]
+[ext_resource type="PackedScene" path="res://scenes/UI/loading/parts/BorderColor.tscn" id="2"]
+[ext_resource type="Texture2D" path="res://assets/ui/themes/bck-hrz-grd.png" id="3"]
 
 [node name="LoadingBorder" type="Control"]
 anchor_right = 1.0
@@ -28,7 +28,7 @@ offset_right = 1280.0
 offset_bottom = 240.0
 size_flags_horizontal = 3
 size_flags_vertical = 3
-color = Color( 0, 0, 0, 1 )
+color = Color(0, 0, 0, 1)
 
 [node name="ColorRect" type="TextureRect" parent="BackgroundGradient"]
 offset_top = 240.0
@@ -36,7 +36,7 @@ offset_right = 1280.0
 offset_bottom = 480.0
 size_flags_horizontal = 3
 size_flags_vertical = 3
-texture = ExtResource( 3 )
+texture = ExtResource("3")
 expand_mode = 1
 __meta__ = {
 "_edit_use_anchors_": false
@@ -63,13 +63,13 @@ __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="BorderLeft" parent="LabelAndBorder" instance=ExtResource( 2 )]
+[node name="BorderLeft" parent="LabelAndBorder" instance=ExtResource("2")]
 anchor_right = 0.0
 anchor_bottom = 0.0
 offset_right = 523.0
 offset_bottom = 60.0
 
-[node name="LabelLoading" parent="LabelAndBorder" instance=ExtResource( 1 )]
+[node name="LabelLoading" parent="LabelAndBorder" instance=ExtResource("1")]
 anchor_left = 0.0
 anchor_top = 0.0
 anchor_right = 0.0
@@ -79,7 +79,7 @@ offset_top = 0.0
 offset_right = 736.0
 offset_bottom = 56.0
 
-[node name="BorderRight" parent="LabelAndBorder" instance=ExtResource( 2 )]
+[node name="BorderRight" parent="LabelAndBorder" instance=ExtResource("2")]
 anchor_right = 0.0
 anchor_bottom = 0.0
 offset_left = 756.0