Add root-level EditorConfig for contributor consistency

[dnzbtc]

Describe the solution you'd like

The repository currently relies on formatter tooling, but does not expose a root-level .editorconfig file for consistent editor behavior across contributors.

Adding an .editorconfig would help standardize:

• indentation
• line endings
• trailing whitespace handling
• newline behavior

This would improve contributor consistency across different editors and IDE environments.

Describe alternatives you've considered.

Contributors can currently rely on formatter tooling manually, but a repository-level EditorConfig would provide editor-agnostic consistency.

[Hobie1Kenobi]

Okay, here's a GitHub issue comment:

Hi team,

I'd like to propose adding a root-level `.editorconfig` file to this repository. This will enforce consistent formatting across contributors, addressing indentation, line endings, whitespace, and newline behavior – improving overall code quality and collaboration.

**Approach:** I'll create a `.editorconfig` file with sensible defaults, ensuring compatibility with common editors.  I’ll then commit and push the changes.

**Deliverables:** A single commit containing the `.editorconfig` file.

**ETA:** 2-4 hours

**Payout Address (Base):** `0x408f39B19266022FeC03076091e59D1f4f163658`

Thanks!

[Hobie1Kenobi]

Bounty completion PR opened: #2660

Changed files: .editorconfig

Base payout address: 0x408f39B19266022FeC03076091e59D1f4f163658