chore(deps): support flutter 3.44 stable (simple_icons, extended_text_field)

The CI/release toolchain uses the latest stable Flutter, now 3.44.1, which
broke two dependencies:

- simple_icons 14.6.1 extends IconData, now a final class -> bump to 16.23.0.
- extended_text_field 16.0.2 (latest pub release) vendors an EditableText copy
  referencing ExtendSelectionByPageIntent, removed in 3.44 -> point at a fork
  (tommyxchow/extended_text_field@76305e9) that drops the unused handler, pinned
  by commit SHA.

Restores flutter analyze (no issues) and flutter test (all pass) on 3.44.1.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

pubspec.lock

@@ -316,10 +316,11 @@ packages:
   extended_text_field:
     dependency: "direct main"
     description:
-      name: extended_text_field
-      sha256: "3996195c117c6beb734026a7bc0ba80d7e4e84e4edd4728caa544d8209ab4d7d"
-      url: "https://pub.dev"
-    source: hosted
+      path: "."
+      ref: "76305e9b115f0b41dc0d23e7a4f651df454fea89"
+      resolved-ref: "76305e9b115f0b41dc0d23e7a4f651df454fea89"
+      url: "https://github.com/tommyxchow/extended_text_field.git"
+    source: git
     version: "16.0.2"
   extended_text_library:
     dependency: transitive
@@ -788,10 +789,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
+      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
       url: "https://pub.dev"
     source: hosted
-    version: "1.17.0"
+    version: "1.18.0"
   mime:
     dependency: transitive
     description:
@@ -1108,10 +1109,10 @@ packages:
     dependency: "direct main"
     description:
       name: simple_icons
-      sha256: "2ca3cd79c9f12e97a8588cae0f342609f19fd2e82315356cb09b5c4987ad0808"
+      sha256: "21246ffcaaf9f560695596093c2ecf9fa763fd112a15916fbe7d282932430bae"
       url: "https://pub.dev"
     source: hosted
-    version: "14.6.1"
+    version: "16.23.0"
   simple_pip_mode:
     dependency: "direct main"
     description:
@@ -1242,10 +1243,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
+      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.10"
+    version: "0.7.11"
   typed_data:
     dependency: transitive
     description: