Make it easier for trial and error to apply user scripts

[mizdra]

• eslint-interactive has several actions to fix problems using user scripts (e.g. "Apply suggestions", "Make forcibly fixable and run eslint --fix").
• The operation flow of these actions is as follows
  1. When the user launches an action, a temporary file is opened in the editor for writing the user script.
  2. The user edits the temporary file
  3. When the temporary file is closed in the editor, eslint-interactive uses the user script to fix the problem.
• If the behavior of the user script is not as expected, the flow must be redone from the beginning.
  • This makes trial-and-error difficult.
• So we would like to make trial-and-error easier.

[mizdra]

My idea:

• Apply user script when the file is saved, not when the file is closed
  • When the file is saved again, undo and re-execute the user script.
  • This allows the user to quickly repeat the loop of checking the behavior of user script and modifying it.
• Write the stdout of user script to a temporary file (e.g. node_modules/.cache/eslint-interactive/x.y.z/user-script-output.txt).
  • This allows users to easily see the debug output of user script using tail -f node_modules/.cache/eslint-interactive/x.y.z/user-script-output.txt.