feat: Windows compatibility (#836)

* feat: win compatibility

* fix

* fix: uptime parse

* opt.: linux uptime accuracy

* fix: windows temperature fetching

* opt.

* opt.: powershell exec

* refactor: address PR review feedback and improve code quality

### Major Improvements:
- **Refactored Windows status parsing**: Broke down large `_getWindowsStatus` method into 13 smaller, focused helper methods for better maintainability and readability
- **Extracted system detection logic**: Created dedicated `SystemDetector` helper class to separate OS detection concerns from ServerProvider
- **Improved concurrency handling**: Implemented proper synchronization for server updates using Future-based locks to prevent race conditions

### Bug Fixes:
- **Fixed CPU percentage parsing**: Removed incorrect '*100' multiplication in BSD CPU parsing (values were already percentages)
- **Enhanced memory parsing**: Added validation and error handling to BSD memory fallback parsing with proper logging
- **Improved uptime parsing**: Added support for multiple Windows date formats and robust error handling with validation
- **Fixed division by zero**: Added safety checks in Swap.usedPercent getter

### Code Quality Enhancements:
- **Added comprehensive documentation**: Documented Windows CPU counter limitations and approach
- **Strengthened error handling**: Added detailed logging and validation throughout parsing methods
- **Improved robustness**: Enhanced BSD CPU parsing with percentage validation and warnings
- **Better separation of concerns**: Each parsing method now has single responsibility

### Files Changed:
- `lib/data/helper/system_detector.dart` (new): System detection helper
- `lib/data/model/server/cpu.dart`: Fixed percentage parsing and added validation
- `lib/data/model/server/memory.dart`: Enhanced fallback parsing and division-by-zero protection
- `lib/data/model/server/server_status_update_req.dart`: Refactored into 13 focused parsing methods
- `lib/data/provider/server.dart`: Improved synchronization and extracted system detection

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* refactor: parse & shell fn struct

---------

Co-authored-by: Claude <noreply@anthropic.com>

README.md

@@ -10,7 +10,7 @@ English | [简体中文](README_zh.md)
 </div>
 
 <p align="center">
-A Flutter project which provide charts to display <a href="https://github.com/lollipopkit/flutter_server_box/issues/43">Linux</a> server status and tools to manage server.
+A Flutter project which provides charts to display Linux, Unix and Windows server status and tools to manage servers.
 <br>
 Especially thanks to <a href="https://github.com/TerminalStudio/dartssh2">dartssh2</a> & <a href="https://github.com/TerminalStudio/xterm.dart">xterm.dart</a>.
 </p>
@@ -26,7 +26,7 @@ Especially thanks to <a href="https://github.com/TerminalStudio/dartssh2">dartss
   </tr>
 </table>
 
-## 📥 Install
+## 📥 Installation
 
 |Platform| From|
 |--|--|
@@ -36,7 +36,7 @@ Especially thanks to <a href="https://github.com/TerminalStudio/dartssh2">dartss
 
 Please only download pkgs from the source that **you trust**!  
 
-## 🔖 Feature
+## 🔖 Features
 
 - `Status chart` (CPU, Sensors, GPU...), `SSH` Term, `SFTP`, `Docker & Process & Systemd`, `S.M.A.R.T`...
 - Platform specific: `Bio auth`、`Msg push`、`Home widget`、`watchOS App`...
@@ -61,7 +61,7 @@ Before you open an issue, please read the following:
 
 After you read the above, you can open an [issue](https://github.com/lollipopkit/flutter_server_box/issues/new).
 
-## 🧱 Contribution
+## 🧱 Contributions
 
 Any positive contribution is welcome.