fix: resolve colors undefined and logger.warning errors in CLI

[HarshVz]

fix: resolve colors undefined and logger.warning errors in CLI

This PR fixes two critical issues in the bin/http-server
CLI that caused crashes when using the --websocket flag or when encountering fatal errors with --no-panic:

• Fixed ReferenceError: colors is not defined: The codebase uses chalk for terminal styling, but several locations were incorrectly referencing a colors variable that was never imported. All instances have been updated to use chalk.
• Fixed TypeError: logger.warning is not a function: The logger object used for CLI output was missing a warning method. This caused a crash when the server tried to warn the user that WebSocket proxying requires a proxy target. I have added warning: console.warn to the logger definition.

Relevant issues

fixes #949

Contributor checklist

• Provide tests for the changes (unless documentation-only)
• Documented any new features, CLI switches, etc. (if applicable)
  • Server --help output
  • README.md
  • doc/http-server.1 (use the same format as other entries)
• The pull request is being made against the master branch

Maintainer checklist

• Assign a version triage tag
• Approve tests if applicable