添加了C语言前置知识的模块

[Juryorca]

顺便开了Q&A部分的文件夹在docs/qna。

closes #30

[Copilot]

Pull Request Overview

This PR adds a new documentation file for C programming pre-knowledge questions and answers. The change introduces a single index file that appears to be a placeholder or initial setup for organizing C language prerequisite content.

• Added a new index file for C pre-knowledge documentation section

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[Copilot]

The index file contains only a placeholder comment '#index.md' without any actual documentation content. Consider adding meaningful content such as an introduction to C pre-knowledge topics, a table of contents, or links to related sections.

Suggested change

	#index.md
	# C Pre-Knowledge
	Welcome to the C Pre-Knowledge section! This documentation provides an overview of the foundational concepts you should understand before diving into C programming.
	## Table of Contents
	- [Introduction to Programming Concepts](./intro-to-programming.md)
	- [Basic Computer Architecture](./computer-architecture.md)
	- [Number Systems and Data Representation](./number-systems.md)
	- [Algorithms and Flowcharts](./algorithms-flowcharts.md)
	- [Related Resources](./related-resources.md)
	## Getting Started
	If you are new to programming or want to refresh your knowledge before learning C, start with the topics above. Each section provides explanations, examples, and links to further reading.
	---
	For questions or feedback, please refer to the [Q&A section](../qna.md).

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Pull Request Overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

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[Juryorca]

需要给想搞这个的在我fork里都加权限吗？还是让大家都pull request到我那个fork ?