feat(developer): kmc-convert: new conversion .keylayout->kmn 😎

[SabineSIL]

kmc-convert provides tooling to convert between various common keyboard description file formats. Each conversion will be implemented in its single, separate module (and each module will done in its own PR)

This PR will address the conversion keylayout → kmn

• keylayout → kmn
• xkb→ kmn
• keylayout → ldml
• xkb→ ldml
• kmn→ ldml
• msklc→ kmn
• msklc→ ldml
• ldml→ kmn
• (inkey→ kmn)
• (inkey→ ldml)

@keymanapp-test-bot skip

• feat(developer): kmc-convert: new conversion .keylayout->kmn 😎 #12564

[keymanapp-test-bot]

User Test Results

Test specification and instructions

User tests are not required

Test Artifacts

• Android
  • Keyman for Android apk - build : all tests passed (no artifacts on BuildLevel "build")
  • FirstVoices Keyboards for Android apk - build : all tests passed (no artifacts on BuildLevel "build")
  • FirstVoices Keyboards for Android apk (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
  • KeyboardHarness apk - build : all tests passed (no artifacts on BuildLevel "build")
  • Keyman for Android apk (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
  • KMSample1 apk - build : all tests passed (no artifacts on BuildLevel "build")
  • KMSample2 apk - build : all tests passed (no artifacts on BuildLevel "build")
• iOS
  • Keyman for iOS (simulator image) - build : all tests passed (no artifacts on BuildLevel "build")
  • FirstVoices Keyboards for iOS (simulator image) - build : all tests passed (no artifacts on BuildLevel "build")
  • FirstVoices Keyboards for iOS (simulator image) (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
  • Keyman for iOS (simulator image) (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
• macOS
  • Keyman for macOS - build : all tests passed (no artifacts on BuildLevel "build")
  • Keyman for macOS (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
• Web
  • KeymanWeb Test Home - build : all tests passed (no artifacts on BuildLevel "build")