v3.40.0

Started off the official v3.39.0 release with the following changes:

• Changed the package name to @bref.sh/serverless
• Removed the standalone binary
• Removed all plugins and code related to Serverless Dashboard/Enterprise/Telemetry
• Removed auto-updating
• Updated dependencies to fix vulnerabilities in dependencies
• Re-organized the documentation
• Remove Node deprecation warning
• Remove Tencent Cloud support
• Remove post-install messages
• Remove support for local installation fallback