Add a minimal .editorconfig for cross-editor consistency

[Vrindakr3300]

Summary

Adds a minimal .editorconfig file to provide consistent editor behavior across environments.

Changes

• UTF-8 charset
• LF line endings
• Final newline insertion
• Trailing whitespace trimming
• Tab indentation for Go files
• 2-space indentation for YAML, JSON, and Markdown files

Fixes #78

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds an .editorconfig file to enforce consistent file formatting across editors for the repository.

Changes:

• Sets baseline formatting rules (UTF-8, LF line endings, final newline, trim trailing whitespace) for all files.
• Configures Go files to use tab indentation.
• Configures YAML, JSON, and Markdown files to use 2-space indentation.

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