convert to headless puppeteer

[cameronaaron]

Summary:
This pull request replaces Electron with Puppeteer for headless browser automation in the Matrix-Google Voice bridge. The key motivation for this change is to reduce resource usage and simplify deployment, especially in containerized environments.

Key Changes:
Browser Initialization:

Replaced Electron-based initialization with Puppeteer.
Puppeteer now handles launching a headless browser to interact with Google Voice.

Script Injection:

Script loading previously done via webContents in Electron is now handled with page.addScriptTag() in Puppeteer.

Request Interception:

Network request interception logic has been moved to Puppeteer’s page.on('request', ...) to block unnecessary requests and allow only essential ones.

JavaScript Execution:

Replaced Electron’s webContents.executeJavaScript() with Puppeteer’s page.evaluate() to execute custom scripts within the browser context.

Inter-Process Communication (IPC):

Retained the same IPC mechanism (stdin and stdout) for communication between the Go application and the headless browser, ensuring backward compatibility.
File Renaming:

Benefits:
Reduced Overhead: Puppeteer is lighter than Electron, leading to lower resource usage.
Easier Containerization: Puppeteer integrates better with containers, eliminating the need for Electron’s GUI components.
More Streamlined Dependencies: Fewer dependencies are required compared to Electron.
Testing:
Successfully tested all major functionalities, including:
Browser initialization
Script injection
Request interception
JavaScript execution
IPC communication