What does this PR do?

This pull request introduces several updates to improve code readability, consistency, and functionality in the @vibe-kit/grok-cli project. The most significant changes include updating the package version, enforcing consistent use of double quotes, restructuring code for better readability, and enhancing the processPromptHeadless function to output OpenAI-compatible messages.

General Improvements:

• Version Update: Updated the package version in package.json from 0.0.14 to 0.0.16.
• Consistent Double Quotes: Replaced all single quotes with double quotes across the src/index.ts file for consistent string formatting. [1] [2] [3] [4]

Code Readability Enhancements:

• Improved Code Formatting: Reformatted long strings and function calls to span multiple lines for better readability. [1] [2] [3]

Functional Enhancements:

• Enhanced processPromptHeadless Function: Modified the function to convert chat entries into OpenAI-compatible message objects, including support for tool calls. Each message is now output as a separate JSON object, and errors are formatted in OpenAI-compatible style.

Fixes #45

Checklist

• I tested my changes
• I reviewed my own code