Improvement/linting setup

[Saurabh2402]

🔧 Add Linting Configuration and Apply Staticcheck Fixes

Step2 towards #2029

Changes Made

📋 Linting Configuration

• Extended .golangci.yml with linting section
• Added linters configuration with default: none
• Enabled staticcheck linter for comprehensive static analysis

🔍 Static Analysis Fixes

• Executed staticcheck linter across the entire repository
• Applied auto-fixable suggestions to improve code quality

🔄 Branch Synchronization

• Synced with formatting PR(Improvement/formatting setup #2041) to prevent merge conflicts since it would get merged first.

[Saurabh2402]

⚠️ Code Style Questions for Maintainer @motatoes

Error String Conventions:

1. Should we follow Go's convention of not capitalising error strings?
2. Should we avoid ending error strings with punctuation per Go conventions?
3. Here is one of the example, the codebase has similar implementation of error vars at other places: CodeLink