Sort by Key Length

Smoke tests:

>>> from techminer2.thesaurus.user import InitializeThesaurus
>>> (
...     InitializeThesaurus()
...     .with_thesaurus_file("demo.the.txt")
...     .with_field("raw_descriptors")
...     .where_root_directory("examples/fintech/")
...     .using_colored_output(False)
...     .run()
... )
INFO: Thesaurus initialized successfully.
  Success : True
  File    : examples/fintech/data/thesaurus/demo.the.txt
  Status  : 1721 keys found
  Header  :
    A_A_THEORY
      A_A_THEORY
    A_BASIC_RANDOM_SAMPLING_STRATEGY
      A_BASIC_RANDOM_SAMPLING_STRATEGY
    A_BEHAVIOURAL_PERSPECTIVE
      A_BEHAVIOURAL_PERSPECTIVE
    A_BETTER_UNDERSTANDING
      A_BETTER_UNDERSTANDING
    A_BLOCKCHAIN_IMPLEMENTATION_STUDY
      A_BLOCKCHAIN_IMPLEMENTATION_STUDY
    A_CASE_STUDY
      A_CASE_STUDY
    A_CHALLENGE
      A_CHALLENGE
    A_CLUSTER_ANALYSIS
      A_CLUSTER_ANALYSIS

>>> from techminer2.thesaurus.user import SortByKeyLength
>>> (
...     SortByKeyLength()
...     .with_thesaurus_file("demo.the.txt")
...     .where_root_directory("examples/fintech/")
...     .using_colored_output(False)
...     .run()
... )
INFO: Thesaurus sorted successfully.
  Success : True
  File    : examples/fintech/data/thesaurus/demo.the.txt
  Header  :
    CONTINUOUS_INTENTION_TO_USE_MOBILE_FINTECH_PAYMENT_SERVICES
      CONTINUOUS_INTENTION_TO_USE_MOBILE_FINTECH_PAYMENT_SERVICES
    UNIFIED_THEORY_OF_ACCEPTANCE_AND_USE_OF_TECHNOLOGY_MODEL
      UNIFIED_THEORY_OF_ACCEPTANCE_AND_USE_OF_TECHNOLOGY_MODEL
    A_NOVEL_HYBRID_MULTIPLE_CRITERIA_DECISION_MAKING_METHOD
      A_NOVEL_HYBRID_MULTIPLE_CRITERIA_DECISION_MAKING_METHOD
    THAT_FUTURE_AND_PRESENT_MOBILE_FINTECH_PAYMENT_SERVICES
      THAT_FUTURE_AND_PRESENT_MOBILE_FINTECH_PAYMENT_SERVICES
    THE_MOST_IMPORTANT_AND_FASTEST_GROWING_FINTECH_SERVICES
      THE_MOST_IMPORTANT_AND_FASTEST_GROWING_FINTECH_SERVICES
    THE_HEFEI_SCIENCE_AND_TECHNOLOGY_RURAL_COMMERCIAL_BANK
      THE_HEFEI_SCIENCE_AND_TECHNOLOGY_RURAL_COMMERCIAL_BANK
    THE_MODIFIED_VISEKRITERIJUMSKO_KOMPROMISNO_RANGIRANJE
      THE_MODIFIED_VISEKRITERIJUMSKO_KOMPROMISNO_RANGIRANJE
    PURCHASE_RELATED_GLOBAL_MOBILE_PAYMENT_MARKET_SIZE
      PURCHASE_RELATED_GLOBAL_MOBILE_PAYMENT_MARKET_SIZE