Exact Code Search: Find code faster across repositories

Introduced Exact Code Search, a new capability powered by Zoekt, to provide lightning-fast and precise code search across large codebases. This feature leverages positional trigrams for exact matches, optimized regular expression performance, and a distributed, self-registering node architecture with intelligent load balancing and seamless security integration. It addresses challenges of traditional code search by eliminating false positives and providing contextual multi-line results, significantly improving debugging, code exploration, refactoring, and security auditing workflows.