Refactor bot logic and add tests for file uploads

Refactored src/index.js to modularize and simplify Telegram file and photo upload handling to Google Drive. Enhanced Google authentication and file upload logic, improved error handling, and added unit tests in test/index.test.js. Updated package.json with metadata and made the package public. Adjusted wrangler.jsonc to set CPU limits and add environment variables.

wrangler.jsonc

@@ -5,6 +5,9 @@
 {
 	"$schema": "node_modules/wrangler/config-schema.json",
 	"compatibility_date": "2025-07-03",
+	"limits": {
+		"cpu_ms": 10000
+	},
 	"main": "src/index.js",
 	"name": "gdrive-upload-robot",
 	"observability": {
@@ -12,5 +15,8 @@
 	},
 	"placement": {
 		"mode": "smart"
+	},
+	"vars": {
+		"ENVIRONMENT": "production"
 	}
 }