Fix Go's GOPROXY Error in 30 Seconds

The 'GOPROXY list is not the empty string, but contains no entries' error occurs when Go's module proxy variable is malformed, often due to stray commas or shell overrides. Clearing the session override with 'unset GOPROXY' and setting a valid proxy via 'go env -w GOPROXY=https://proxy.golang.org,direct' resolves it. The issue is common on Windows with Git Bash, where environment variables silently override Go's config.