Fix ESLint debug output log level

[Pradeep Ramola (pradeep-ramola)]

Fixes #2060

Summary

When eslint.debug is enabled, ESLint debug output is emitted through stderr by the debug package, so VS Code shows those informational debug lines with an error label.

This change routes only ESLint debug output (eslint: / eslintrc: namespaces) through connection.console.info, while leaving real stderr/server errors untouched.

It also sets DEBUG_HIDE_DATE=true and DEBUG_COLORS=false so the output channel does not show duplicate timestamps or ANSI color codes.

Validation

Passed locally:

npm run lint --prefix server
npm run lint --prefix client
npx tsc --ignoreConfig --noEmit --target ES2022 --module Node16 --moduleResolution Node16 --types node --skipLibCheck server/src/debugLog.ts

[Dirk Bäumer (dbaeumer)]

Although this is working the server side is not the right place to fix this. Major reason is that the server doesn't know anything about the formatting of the output channel and different clients might handle things differently. A better solution is to do this on the client side by overriding the error, warn, log and info method and string any date format from the start of the message.

[Dirk Bäumer (dbaeumer)]

See latest comment in PR.