Milestone: First Release

Description:
This milestone marks the first release of the project. This release will provide the core functionality.

Features:

• Core Search Engine: Implement basic search functionality, including indexing and querying.
• Index Persistence: Save the current in-memory index to disk and ensure data integrity.
• Backup System: Periodic backups of the index to prevent data loss, with timestamped backup files.
• Basic Configuration: Allow basic configuration for backup frequency and index update intervals.
• Error Handling: Basic error handling for read/write failures or backup issues.
• Command-line Shell: Provides an interface to interact with the engine.
• Boolean Query Support: Supports AND, OR, and NOT operations with parenthesis-based query.
• Publishing the engine as a service: Make the search engine available as a service with an API for interaction with frontend Goolean-web