Add build/commands/tsconfig.json.

[goodov]

Add tsconfig.json with recommended flags to run .ts natively via Node (see [1]).
Fix simple type issues and disable type checking in other files to fix them separately.

The current module system is set explicitly to CommonJS via local build/commands/package.json to not depend on the root package.json (Node lookups closest package.json to infer module system). Switch to ESM will be made separately.

1. https://nodejs.org/docs/latest-v24.x/api/typescript.html

Resolves brave/brave-browser#53130

[brave-builds]

A Storybook has been deployed to preview UI for the latest push

[brave-builds]

Warning

You have got a presubmit warning. Please address it if possible.

Found 2 lines longer than 80 characters (first 5 shown).

Items:

build/commands/lib/guessConfig.js, line 54, 111 chars
build/commands/lib/guessConfig.js, line 65, 144 chars

[github-actions]

📋 Code Owners Summary

17 file(s) changed, 17 with assigned owners

2 team(s) affected: @brave/build-commands-reviewers, @brave/js-deps-reviewers

---

Owners and Their Files

@brave/build-commands-reviewers — 15 file(s)

• build/commands/lib/affectedTests.js
• build/commands/lib/buildChromiumRelease.js
• build/commands/lib/config.js
• build/commands/lib/envConfig.js
• build/commands/lib/envConfig.test.js

... and 10 more files

• build/commands/lib/guessConfig.js
• build/commands/lib/l10nUtil.js
• build/commands/lib/logging.js
• build/commands/lib/syncUtils.js
• build/commands/lib/test.js
• build/commands/lib/testUtils.js
• build/commands/lib/updatePatches.js
• build/commands/lib/util.js
• build/commands/scripts/audit.js
• build/commands/tsconfig.json

@brave/js-deps-reviewers — 2 file(s)

• build/commands/package.json
• package.json

[petemill]

Great to be making progress on this!

[brave-builds]

Released in v1.89.78