chore(core): move test helpers into helpers/ folder 🔱

[mcdurdin]

Test-bot: skip

[keymanapp-test-bot]

User Test Results

Test specification and instructions

User tests are not required

Test Artifacts

• Developer
  • Keyman Developer - build : all tests passed (no artifacts on BuildLevel "build")
  • Compiler Regression Tests - build : all tests passed (no artifacts on BuildLevel "build")
  • Keyman Developer (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
  • kmcomp.zip - build : all tests passed (no artifacts on BuildLevel "build")
  • kmcomp.zip (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
• Keyboards
  • Test Keyboards - 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")
• Windows
  • Keyman for Windows - build : all tests passed (no artifacts on BuildLevel "build")
  • FirstVoices Keyboards for Windows - build : all tests passed (no artifacts on BuildLevel "build")
  • FirstVoices Keyboards for Windows (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
  • Keyman for Windows (old PRs) - build : all tests passed (no artifacts on BuildLevel "build")
  • Text Editor (ARM64) - build : all tests passed (no artifacts on BuildLevel "build")
  • Text Editor (x64) - build : all tests passed (no artifacts on BuildLevel "build")
  • Text Editor (x86) - build : all tests passed (no artifacts on BuildLevel "build")