Split main.ts in separate modules

[cristianoventura]

The current main.ts file has grown significantly in size and complexity, making it difficult to maintain and scale over time. As new features and changes are added, the file has become harder to navigate and troubleshoot.

Following patterns adopted in other open-source Electron projects, we'd like to split the logic into separate files/modules that have a clear and single responsibility.

Example:

├── src
│   ├─ main
│   ├───── browser.ts
│   ├───── ipc.ts
│   ├───── logger.ts
│   ├───── main.ts
│   ├───── mainWindow.ts
│   ├───── menu.ts
│   ├───── proxy.ts
│   ├───── script.ts
│   └───── splashscreenWindow.ts