Remove CircleCI configuration and related files

[magistersart]

Summary

• Removed .circleci/ configuration directory
• Removed .husky/validate-circleci-config.sh script
• Removed lint-staged configuration section from package.json

Changes Made

• ✅ Deleted CircleCI configuration files
• ✅ Removed Husky CircleCI validation hooks
• ✅ Cleaned up lint-staged configuration references

Test Plan

• [ ] Verify no CircleCI configurations remain
• [ ] Confirm build and test processes still work
• [ ] Check that commit hooks function properly without CircleCI validation

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