Update LaTeX compilation process to use more modern tools.

…PROXY_URLS

- Add `proxy_utils.py` containing `is_private_ip` and enhanced `should_use_proxy` functions
- Update `config.py` and include a sample configuration for `NO_PROXY_URLS` used by `proxy_utils.py`
- Use `should_use_proxy` function to enhance the related operations in `request_llms/bridge_chatgpt.py`

- Add selective_proxy_post decorator in proxy_utils.py
- Apply decorator to requests.post in bridge_chatgpt.py

- Rename decorator in proxy_utils.py from selective_proxy_post to selective_proxy
- Update decorator usage in bridge_chatgpt.py to reflect the new name
- This change better reflects the decorator's potential use for all HTTP methods, not just POST

…ge_claude.py

- Added checks for localhost and ip6-localhost to bypass proxy.
- Used ip.is_loopback for both IPv4 and IPv6 loopback detection.