Make js-lint self-contained by invoking the bundled Prettier CLI

[CDeltakai]

Specification

Projects that don’t list Prettier as a direct dev-dependency fail during the “prettier” phase with spawnSync prettier ENOENT.
This happens because the linter calls prettier by name and the binary is only present in node_modules/.bin when a repo installs Prettier itself or when npm hoists it to the top level.

Making the linter call the bundled Prettier binary guarantees:

• Zero setup – repos only install @matrixai/lint.
• Consistent Prettier version across all projects.
• No accidental breakage when npm’s hoisting rules change.

Additional context

Tasks

1. Make the matrixai-lint command invoke the bundled Prettier rather than the target repo's Prettier

[linear]

ENG-617

[CMCDragonkai]

Close this if this is done.