Updated introduction

[iesahin]

✨

Description by Callstackai

This PR updates the introduction section of the documentation for Xvc, providing a more detailed overview of its features and usage examples.

Diagrams of code changes

sequenceDiagram
    participant User
    participant Xvc
    participant Storage
    participant Pipeline

    User->>Xvc: Initialize project (xvc init)
    Xvc-->>User: Create .xvc/ directory

    User->>Xvc: Track files (xvc file track)
    Xvc-->>User: Calculate file digests & store in cache

    User->>Storage: Configure storage (xvc storage new)
    Storage-->>User: Storage configured

    User->>Storage: Send/bring files (xvc file send/bring)
    Storage-->>User: Files transferred to/from storage

    User->>Pipeline: Create pipeline step (xvc pipeline step new)
    Pipeline-->>User: Step created

    User->>Pipeline: Add dependencies (xvc pipeline step dependency)
    Pipeline-->>User: Dependencies configured

    User->>Pipeline: Run pipeline (xvc pipeline run)
    Pipeline-->>User: Execute steps based on dependencies

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Files Changed

File	Summary
book/src/intro/index.md	Updated the introduction section with detailed descriptions and usage examples for Xvc.

This PR includes files in programming languages that we currently do not support. We have not reviewed files with the extensions .md. See list of supported languages.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.28%. Comparing base (befbaa0) to head (e3807f1).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #269      +/-   ##
==========================================
+ Coverage   71.24%   71.28%   +0.04%     
==========================================
  Files         126      126              
  Lines       14326    14326              
==========================================
+ Hits        10207    10213       +6     
+ Misses       4119     4113       -6     

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