fix(web): fix handling of fonts with single quotes in filename 🍒 🏠

[jahorton]

Cherry-pick-of: #13032, but without the data URL components, as that tidbit was added during 18.0-alpha.

User Testing

This is how the default layer of the keyboard looks in desktop-mode Keyman Engine for Web:

• TEST_ANDROID: Using the Android test build from this PR and the soninke_n_ti.kmp package from https://jahorton.github.io/soninke_n_ti.kmp, verify that the keyboard loads properly and has proper characters for its font.

• TEST_IOS: Using the Android test build from this PR and the soninke_n_ti.kmp package from https://jahorton.github.io/soninke_n_ti.kmp, verify that the keyboard loads properly and has proper characters for its font.

[keymanapp-test-bot]

User Test Results

Test specification and instructions

• ✅ TEST_ANDROID (PASSED) (notes)
• ✅ TEST_IOS (PASSED) (notes)

Test Artifacts

• Android
  • Keyman for Android apk
  • FirstVoices for Android 16.0 apk
  • FirstVoices Keyboards for Android apk
  • KeyboardHarness apk
  • Keyman for Android 16.0 apk
  • KMSample1 apk
  • KMSample2 apk
• Developer
  • Keyman Developer
  • Compiler Regression Tests
  • kmcomp.zip
• iOS
  • Keyman for iOS (simulator image)
  • FirstVoices Keyboards for iOS (simulator image)
  • TestFlight internal PR build version - 17.0.334 (0.13041.12691)
• Keyboards
  • Test Keyboards
• Web
  • KeymanWeb Test Home
• Windows
  • Keyman for Windows
  • FirstVoices Keyboards for Windows
  • Text Editor (32 bit)
  • Text Editor (64 bit)

[dinakaranr]

Test Results

I tested this issue with the attached "17.0.334-test-13041" build(24/01/2025) on Android 14 and iPhone 13(iOS 17.4). Here is my observation.

• TEST_ANDROID (Passed):

1. Installed the "Keyman-17.0.334.apk" file from this PR build.
2. Open the Keyman app.
3. Checked the "Enable Keyman as system-wide keyboard". Set the keyboard as the default keyboard box on the settings page.
4. Installed the "soninke_n_ti.kmp" which is attached to this PR.
5. Verified that the keyboard loads properly
6. Verified that the characters appear correctly when typing on it.
   It works well.

• TEST_IOS (Passed):

1. Installed the "Keyman-17.0.334.dmg" file from this PR build.
2. Open the Keyman app.
3. Checked the "Enable Keyman as system-wide keyboard". Set the keyboard as the default keyboard box on the settings page.
4. Installed the "soninke_n_ti.kmp" which is attached to this PR.
5. Verified that the keyboard loads properly
6. Verified that the characters appear correctly when typing on it.
   It works well. Thank you.

[darcywong00]

lgtm

[keyman-server]

Changes in this pull request will be available for download in Keyman version 17.0.334