Refactor: Replace console logging with a dedicated logger

Replaced direct `console.info`, `console.warn`, and `console.error` calls
across the codebase (`src/storage.ts`, `src/main.ts`, `src/extensions.ts`,
`src/updater.ts`, `src/engine/index.ts`) with a new dedicated logger (`src/logger.ts`).
Updated all relevant tests to spy on the logger module instead of global console.

Co-authored-by: Horizontal42 <75383519+Horizontal42@users.noreply.github.com>

src/logger.ts

@@ -0,0 +1,5 @@
+export const logger = {
+  info: (...args: unknown[]) => console.info(...args),
+  warn: (...args: unknown[]) => console.warn(...args),
+  error: (...args: unknown[]) => console.error(...args),
+};