[$12 BOUNTY] [Config] Complete .editorconfig with format checker

[cuentaprueba244w-dotcom]

Bounty: $12 (LT)

Area: .editorconfig + ools/check_format.sh`n

Current state: No automated format checking exists.

What's needed: Add comprehensive .editorconfig and a format checker script that verifies compliance.

Acceptance criteria:

• .editorconfig covers all languages in the repo
• check_format.sh verifies formatting across languages
• Warning comment at top of .editorconfig

Required validation:

• Run python3 build.py
• Include the generated diagnostic .logd artifact from diagnostic/build-XXX.logd in the PR; also include diagnostic/build-XXX.json if present
• Use .github/pull_request_template.md for your submission

[Luzijano]

I’m taking this one now and will submit a scoped PR with the required diagnostics.

[Nexussyn]

Bounty Submission — Runtime Open Federation

Payment address (USDC on Base): 0xb438d36b425b504724a1c72aa0941c80cb940995
We can complete this task and deliver within 24h. Please assign to confirm.

[zjwjing]

I'd like to work on this bounty.

Plan:

1. Create comprehensive .editorconfig covering all languages
2. Add warning comment at top of .editorconfig
3. Create tools/check_format.sh that verifies formatting compliance
4. Script checks: indent style, trailing whitespace, final newline
5. Run python3 build.py for diagnostic artifacts
6. Submit PR

Wallet: already on file with maintainer.