chore: add .editorconfig for consistent code formatting

[UserMandhapati]

Added .editorconfig to standardize indentation, line endings, and whitespace across different editors and IDEs.

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Note

Low Risk
Low risk because it only introduces editor/IDE formatting settings and does not change runtime code or behavior.

Overview
Adds a repository-wide .editorconfig to enforce consistent formatting defaults (spaces, 4-space indents, LF line endings, trim trailing whitespace, final newline), with 2-space indentation overrides for *.json and *.yml.

^{Written by Cursor Bugbot for commit 10e2c0c. This will update automatically on new commits. Configure here.}