Utterances from dialog flow

[jperata]

Actual logic changes are in src/SampleUtterancesBuilder.ts and test/Utterances.ts

But this includes the removal of extra files from lib plus the generation of json files for the utterances test scenario.

[codecov[bot]]

Codecov Report

Merging #6 into master will decrease coverage by 6.38%. The diff coverage is 90%.

@@            Coverage Diff             @@
##           master       #6      +/-   ##
==========================================
- Coverage   97.56%   91.17%   -6.39%     
==========================================
  Files           6        1       -5     
  Lines         164       34     -130     
  Branches       18        6      -12     
==========================================
- Hits          160       31     -129     
+ Misses          4        3       -1

Impacted Files	Coverage Δ
src/SampleUtterancesBuilder.ts	91.17% <90%> (-0.83%)	:arrow_down:
src/BuiltinSlotTypes.ts
src/IntentSchema.ts
src/BuiltinUtterances.ts
src/SkillResponse.ts

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