Migration to Stanford v4.2 Packages

[sergey-tihon]

TODOs:

• [x] Migrate to Github Actions
• [x] Compile v4 packages
• [x] Migrate to new project files
• [x] Build using .NET Core
• [x] Build on macOS
• [x] Use FAKE 5
• [x] Merge samples with tests
• [x] Fix tests
  • [x] Stanford.NLP.CoreNLP.Tests
  • [x] Stanford.NLP.NER.Tests
  • [x] Stanford.NLP.Parser.Tests
    • java.lang.ClassNotFoundException : edu.stanford.nlp.tagger.maxent.ExtractorNonAlphanumeric
  • [x] Stanford.NLP.Segmenter.Tests
  • [x] Stanford.NLP.Tagger.Tests
    • java.lang.ClassNotFoundException : edu.stanford.nlp.tagger.maxent.ExtractorNonAlphanumeric
• [x] Update docs
  • [x] Migrate to Docute
  • [x] Update sample
  • [x] Promote CoreNLP package and archive other docs
• [x] Release new NuGet packages
• Configure Dependabot
• Configure Stale bot