refactor(web): deprecated APIs to remove in v20

[mcdurdin]

• API endpoints deprecated in v19 (feat(web): add keyman.versionInfo API #16351, docs(web): deprecate unused and obsolete API endpoints and docs cleanup #16354), to be removed in version 20:

  • keyman.helpURL
  • keyman.util.rgba()
  • keyman.util.toFloat()
  • keyman.util.toNumber()
  • keyman.util.toNzString()

• Previously deprecated API endpoints to be removed in version 20:

  • keyman.util.createShim()
  • keyman.util.showShim()
  • keyman.util.hideShim()
  • keyboard.KeyboardID

• Deprecated IMX functions and endpoints that will be removed in v20:

  • keyman.interface.focusLastActiveElement()
  • keyman.interface.getLastActiveElement()
  • keyman.interface.hideHelp()
  • keyman.interface.showHelp()
  • keyman.interface.showPinnedHelp()

• Deprecated IMX functions and endpoints that will be retained for compatibility with legacy IMX keyboards:

  • KeymanWeb.FocusLastActiveElement()
  • KeymanWeb.GetLastActiveElement()
  • KeymanWeb.HideHelp()
  • KeymanWeb.ShowHelp()
  • KeymanWeb.ShowPinnedHelp()

• Deprecated functions and endpoints that will be retained for compatibility with legacy keyboards:

  • KeymanWeb.KA()
  • KeymanWeb.KC()
  • KeymanWeb.KCM()
  • KeymanWeb.KDM()

See-also: #16386