Add setter for some FontFaceObject properties

Author: Aditi-1400

src/display/font_loader.js

@@ -457,6 +457,15 @@ class FontFaceObject {
     return this.#fontData.disableFontFace ?? false;
   }
 
+  set disableFontFace(value) {
+    Object.defineProperty(this, "disableFontFace", {
+      value: !!value,
+      writable: false,
+      enumerable: true,
+      configurable: true,
+    });
+  }
+
   get fontExtraProperties() {
     return this.#fontData.fontExtraProperties ?? false;
   }
@@ -501,6 +510,15 @@ class FontFaceObject {
     return this.#fontData.bbox;
   }
 
+  set bbox(bbox) {
+    Object.defineProperty(this, "bbox", {
+      value: bbox,
+      writable: false,
+      enumerable: true,
+      configurable: true,
+    });
+  }
+
   get fontMatrix() {
     return this.#fontData.fontMatrix;
   }

test/pdfs/issue20426.pdf.link

@@ -0,0 +1 @@
+https://github.com/user-attachments/files/23383534/test.1.pdf

test/test_manifest.json

@@ -1948,6 +1948,14 @@
     "type": "eq",
     "forms": true
   },
+  {
+    "id": "issue20426",
+    "file": "pdfs/issue20426.pdf",
+    "md5": "b9a753df595f1dd30505a67c96373dd8",
+    "link": true,
+    "rounds": 1,
+    "type": "eq"
+  },
   {
     "id": "issue13845",
     "file": "pdfs/issue13845.pdf",