feat: upgrade Live2D to support Cubism 3/4/5 models with l2d-widget (#447)

Replace the legacy Cubism 2.1 runtime (l2d.js/pio.js) with l2d-widget,
which auto-detects and supports Cubism 2/3/4/5 model formats (.model.json
and .model3.json). Add NOIR as the new default model, remove old pio model
and runtime files. Add configurable hideAboutMenu option.

Author: matsuzaka-yuki

.gitignore

@@ -53,3 +53,9 @@ src/data/bilibili-data.json
 
 # Lighthouse CI
 .lighthouseci/
+
+# Live2D editor source files
+*.psd
+*.psd~
+*.cmo3
+*.vtube.json

package.json

@@ -47,6 +47,7 @@
 		"dayjs": "^1.11.20",
 		"hastscript": "^9.0.1",
 		"katex": "^0.16.47",
+		"l2d-widget": "^0.0.2",
 		"markdown-it": "^14.1.1",
 		"marked": "^18.0.3",
 		"node-html-parser": "^7.1.0",

pnpm-lock.yaml

@@ -0,0 +1,10 @@
+{
+	"Type": "Live2D Expression",
+	"Parameters": [
+		{
+			"Id": "Param40",
+			"Value": -1,
+			"Blend": "Add"
+		}
+	]
+}

public/pio/models/NOIR/eyeclose.exp3.json

@@ -0,0 +1,14 @@
+{
+    "FileMetadata": {
+        "LastSavedVTubeStudioVersion": "1.32.3",
+        "LastSavedPlatform": "Steam",
+        "LastSavedDateUTC": "Saturday, 23 August 2025, 11:01:46",
+        "LastSavedDateLocalTime": "Saturday, 23 August 2025, 19:01:46",
+        "LastSavedDateUnixMillisecondTimestamp": "1755946906301"
+    },
+    "SceneName": "",
+    "SceneGroupName": "",
+    "SceneModel": "",
+    "SceneID": "",
+    "Items": []
+}