chore: Silence prettier output unless error

[honnix]

Silence prettier output unless error because it defaults to log that is too verbose: https://prettier.io/docs/en/cli.html#--log-level

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Changes are visible to end-users: yes/no

• Searched for relevant documentation and updated as needed: no update needed
• Breaking change (forces users to change their own code or config): yes because users will no longer see detailed outputs
• Suggested release notes appear below: yes

Prettier is now configured to by default log at error level.

Test plan

• Covered by existing test cases

[alexeagle]

why error rather than warn?

[honnix]

Ah, no particular reason, I just happen to have that level patched. I think warn is a better one. Will fix.

[alexeagle]

ah, you missed https://github.com/aspect-build/rules_lint/blob/main/example/tools/format/BUILD.bazel#L17-L21

prettier renamed this option at some point, so it belongs in "userland" where you know the flag name

[honnix]

ah, you missed main/example/tools/format/BUILD.bazel#L17-L21

prettier renamed this option at some point, so it belongs in "userland" where you know the flag name

Ah, this is nice! We will apply the same then. Thank you!