bug(developer): kmc-generate fails with TypeError: Cannot read properties of undefined (reading 'length') if langtags are not provided as a parameter

[sentry-io]

Sentry Issue: KEYMAN-DEVELOPER-2G4

TypeError: Cannot read properties of undefined (reading 'length')
  File "../../../kmc-generate/src/basic-generator.ts", line 30, in BasicGenerator.preGenerate
    this.languageTags = this.options.languageTags.length
  File "../../../kmc-generate/src/keyman-keyboard-generator.ts", line 48, in KeymanKeyboardGenerator._KeymanKeyboardGenerator.run
    if(!this.preGenerate()) {
  File "../../src/commands/generate.ts", line 131, in doGenerate
    const result = await generator.run(options.id); // note: id is currently ignored here
  File "../../src/commands/generate.ts", line 118, in generate
    if(!await doGenerate(callbacks, generator, commanderOptions)) {

[mcdurdin]

New bug in #13075.

[sentry-io]

Sentry Issue: KEYMAN-DEVELOPER-2GE