Ability to use/configure Format On Save to work with prettier configs within folders

[cwhitemaddox]

Right now, with the prettier-vscode extension installed, the extension will recognize prettier configs (e.g. .prettierrc) that are on the root of the vscode workspace/project, but it will not recognize configs that are within folders in that vscode workspace.

It would be helpful to have the prettier-vscode extension recognize and honor the prettier configs that are within folders in a vscode workspace. This is especially helpful in a monorepo context, where different folders of the monorepo can have different package.jsons and different prettier configs.

If, for examble, you have a folder structure in a workspace like so:

codebase-1/
  package.json
  .prettierrc
  src/
    first-script.ts
codebase-2/
  package.json
  .prettierrc
  src/
    second-script.ts

It is currently possible to cd into codebase-1/ and codebase-2/ and run, e.g. npx prettier --write src/, for each, but that does not happen automatically on save like the prettier-vscode extension so helpfully enables.

However, with the vscode workspace opened on code structure above, opening codebase-1/src/first-script.ts and saving the file (with Format On Save enabled), prettier-vscode will not use the config from codebase-1/.prettierrc.

[MrHaila]

To add to the issue, this also affects .prettierignore files. The current workaround is to duplicate the ignore file contents from subfolders into the repo root.