Documentation Improvements

[ChrisNourse]

Readme has some spelling issues

 - Awsome tool. Gas a ton of neet features includig a webpage! 

Add Comments for all functions in this format

/**
 * @brief Main entry point for the dirdoc application.
 *
 * Parses command-line arguments, sets up options (including split options and extra ignore patterns),
 * and calls the document_directory function to generate the documentation.
 *
 * @param argc Argument count.
 * @param argv Argument vector.
 * @return int 0 on success, non-zero on failure.
 */

Make README.md just a tad easier to read.

This part seems out of order
https://github.com/ChrisNourse/dirdoc#universal-binary
and this
https://github.com/ChrisNourse/dirdoc#use-cases

Add an Acknowledgement to Aider, Anthropic, OpenRouter, OpenAI

[ChrisNourse]

#17

[ChrisNourse]

#25

[ChrisNourse]

#20