Add Database.cs with SQLite connection management and helper methods
(Execute, ExecuteScalar, Query), Schema.cs for schema initialization,
and replace default Program.cs with System.CommandLine v3 CLI featuring
global --db/--schema options and an init command.
Design for SQLite-based tracking system to manage the Go-to-.NET port
of nats-server. Includes DB schema (modules, features, unit_tests,
dependencies, library_mappings), Go AST analyzer for codebase
decomposition, .NET CLI tool for ongoing management, and 7 phased
workflow guides.