Implement FYLIA - CLI/TUI conversational development tool for Termux

[Copilot]

Implements the FYLIA specification from commit 272bd2d: a Python-based conversational development assistant designed for Termux on Android, using only standard library dependencies.

Core Architecture

• CLI (cli.py) - argparse-based entry point with chat, map, test, version commands
• TUI (tui.py) - interactive REPL with command system (/map, /stats, /refresh, /exit)
• MapGen (mapgen.py) - AST-based Python code analyzer; extracts classes, functions, methods with line numbers
• Patcher (patcher.py) - unified diff generation, markdown code block extraction, interactive patch application
• MockProvider (providers/mock.py) - keyword-based response simulation for offline operation

Key Features

# Interactive conversational interface
fylia chat

# Project structure visualization
fylia map              # tree view with emoji icons
fylia map -f stats     # file/class/function/method counts
fylia map -f json      # machine-readable output

# Provider testing
fylia test -m "create a function"

The TUI recognizes file instructions in responses:

File: src/example.py
```python
def new_function():
    pass

Shows diff preview → prompts for confirmation → applies patch with backup → regenerates map.

## Implementation Notes

- **Zero external dependencies** - uses only `ast`, `difflib`, `argparse`, `pathlib` from stdlib
- **Python 3.7+** compatible for broad Termux support
- **Italian interface** per specification
- **20 passing tests** covering provider, mapgen, patcher modules

## Structure

src/fylia/
├── cli.py # CLI commands
├── tui.py # Interactive interface
├── mapgen.py # Code structure analyzer
├── patcher.py # Diff/patch management
└── providers/mock.py # Offline AI simulation

tests/
├── test_mock_provider.py
├── test_mapgen.py
└── test_patcher.py

Documentation: INSTALL.md, USAGE.md, ARCHITECTURE.md

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<details>

<summary>Original prompt</summary>

> Reference: https://github.com/meseb/FYLIA-/commit/272bd2d61ed79386ada71d8bbb787df71f231178


</details>



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