update docs for http proxy

[scidomino]

Summary

Update docs to reflect the fact that we removed the --proxy flag.

Related Issues

Fixes #12220

[gemini-code-assist]

Summary of Changes

Hello @scidomino, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the documentation related to proxy configuration. It introduces guidance on using the standard HTTP_PROXY and HTTPS_PROXY environment variables for specifying proxy servers, making the configuration more aligned with common practices. Concurrently, it removes the --proxy command-line flag from the documentation, streamlining the available proxy configuration methods.

Highlights

• Proxy Environment Variables: Added documentation for HTTP_PROXY and HTTPS_PROXY environment variables, explaining their purpose for outgoing HTTP/HTTPS requests and providing an example of their usage.
• Removed CLI Proxy Flag: Removed documentation for the --proxy CLI flag from both configuration guides, indicating it is no longer a supported method for setting the proxy.

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[gemini-code-assist]

Code Review

This pull request updates the documentation to reflect the move from a --proxy command-line flag to using the standard HTTP_PROXY/HTTPS_PROXY environment variables. The changes are clear and consistent across both configuration.md and the legacy configuration-v1.md. I've added a suggestion to also include documentation for the NO_PROXY environment variable, as it's a critical part of proxy configuration for many users and its omission could cause issues.

[github-actions]

Size Change: -2 B (0%)

Total Size: 21.1 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	21.1 MB	-2 B (0%)
./bundle/sandbox-macos-permissive-closed.sb	1.03 kB	0 B
./bundle/sandbox-macos-permissive-open.sb	890 B	0 B
./bundle/sandbox-macos-permissive-proxied.sb	1.31 kB	0 B
./bundle/sandbox-macos-restrictive-closed.sb	3.29 kB	0 B
./bundle/sandbox-macos-restrictive-open.sb	3.36 kB	0 B
./bundle/sandbox-macos-restrictive-proxied.sb	3.56 kB	0 B

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