Add the study plan feature

[mortii]

discussion: #155

todo list:

• [x] combine the existing generators
  • [x] clean the code of the existing generators
    • [x] migrate the code to a common file
    • [x] pylint passes
    • [x] mypy passes
    • [x] reorder function arguments
    • [x] privatize functions
    • [x] update _on_success function
    • [x] change default output file names
  • [x] error when clicking generator buttons without loading files first
  • [x] error if output field is empty
  • [x] delete obsolete ui files
  • [x] rename remaining ui files
  • [x] rename generator_dialog.py -> generators_window.py
  • [x] rename select input button -> select root folder
  • [x] rename the morphemizer combobox
  • [x] change the keyboard shortcut to Ctrl+Shift+G
• [x] pop-up window on generator button push
  • [x] auto populate output file path
    • [x] frequency file
    • [x] study plan
  • [x] cutoff
    • [x] disable the spinbox of the non-selected radio button
    • [x] implement min. occurrence
      • [x] frequency file
      • [x] study plan frequency file
    • [x] implement comprehension percent
      • [x] frequency file
      • [x] study plan frequency file
• [x] add an occurrence column to frequency files
• [x] add file name column to study plan frequency files
• [x] create a files_morphs_dict for the frequency files as well and collapse them later, it makes everything much cleaner
• [x] redo or remove the terminal output the generators produce
• [x] sort the input files based on the order of the currently opened table
• [x] disable the generator buttons until files have been loaded
• [x] add a learning-status column to the csv files
• [x] enable table sorting after loading files
• [x] tests
  • [x] tests pass
    • [x] ff
      • [x] spacy
      • [x] mecab
    • [x] sp
  • [x] manually double check that study plan ff works when used in settings
• [x] guide
  • [x] update the dev guide with the new ui file conversion paths
  • [x] update generators section
  • [x] update frequency file section
  • [x] update settings: note filter: morphemizers
  • [x] update internal links
  • [x] update settings: shortcuts
  • [x] read through the entire guide to make sure it is consistent
• [x] misc
  • [x] frequency-files, known-morphs, and names.txt should be created on profile load if they don't exist

[mortii]

Here is an early and rough pre-release version:

• for devs, pull the study-plan branch: https://github.com/mortii/anki-morphs/tree/study-plan
• non-devs: ankimorphs-v2-2-0-pre-release.ankiaddon (google drive, github doesn't like .addon files)

Any feedback in #155 is welcome!

Edit: ankimorphs-v2-2-1-pre-release.ankiaddon

[mortii]

released in v2.2.0.