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>

scripts/resave_scenes.gd

@@ -0,0 +1,30 @@
+@tool
+extends SceneTree
+
+# Load and re-save every .tscn so embedded sub-resources (inline ArrayMesh,
+# etc.) are rewritten in the current Godot 4 format.
+
+func _init() -> void:
+	for path in _find("res://scenes", ".tscn"):
+		var res = ResourceLoader.load(path, "", ResourceLoader.CACHE_MODE_IGNORE)
+		if res is PackedScene:
+			if ResourceSaver.save(res, path) == OK:
+				print("RESAVED ", path)
+	quit()
+
+func _find(dir_path: String, ext: String) -> Array:
+	var result := []
+	var dir = DirAccess.open(dir_path)
+	if dir == null:
+		return result
+	dir.list_dir_begin()
+	var name = dir.get_next()
+	while name != "":
+		if name != "." and name != "..":
+			var sub = dir_path + "/" + name
+			if dir.current_is_dir():
+				result.append_array(_find(sub, ext))
+			elif name.ends_with(ext):
+				result.append(sub)
+		name = dir.get_next()
+	return result