Synchronize ignored globs

[Roms1383]

Additional features ✨

• create or update existing .gitignore
  • use gitignore.io
  • introspect existing project files to deduce which profile(s) to add
  • keep existing entries and merge
  • add custom folder, at least my-tests
• create or update existing .eslintignore
  • based on reasonable rules ?
  • at least for my-tests
• update existing .lintstagedrc ignore property
  • based on reasonable rules ? (e.g. minified files)
  • at least for my-tests
• create or update existing .dockerignore
  • provided there's Dockerfile in the project
  • based on the same rules as .gitignore ?
• create or update jest configuration to ignore certain globs
  • based on reasonable rules ?
  • at least for my-tests
• there shouldn't be the need for a .remarkignore but, if ever, that should be synchronized too.

[Roms1383]

Note : input and output directories for webpack can be deduced by introspecting webpack configuration, and thus deduce requirements for ignoring minified files.

[Roms1383]

update existing .lintstagedrc ignore property
based on reasonable rules ? (e.g. minified files)
at least for my-tests

probably not relevant

[Roms1383]

There shouldn't be the need for a .remarkignore but, if ever, that should be synchronized too.

probably not relevant