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>

test/sensors_test.dart

@@ -113,15 +113,12 @@ void main() {
       SensorAdaptor.virtual,
       SensorAdaptor.pci,
     ]);
-    expect(
-      sensors.map((e) => e.summary),
-      [
-        '+56.0°C  (high = +105.0°C, crit = +105.0°C)',
-        '+27.8°C  (crit = +119.0°C)',
-        '+56.0°C',
-        '+45.9°C  (low  = -273.1°C, high = +83.8°C)',
-      ],
-    );
+    expect(sensors.map((e) => e.summary), [
+      '+56.0°C  (high = +105.0°C, crit = +105.0°C)',
+      '+27.8°C  (crit = +119.0°C)',
+      '+56.0°C',
+      '+45.9°C  (low  = -273.1°C, high = +83.8°C)',
+    ]);
   });
 
   test('parse sensors2', () {
@@ -138,14 +135,11 @@ void main() {
       SensorAdaptor.pci,
       SensorAdaptor.pci,
     ]);
-    expect(
-      sensors.map((e) => e.summary),
-      [
-        '1.26 V',
-        '1.19 V  (min =  +0.00 V, max =  +1.74 V)',
-        '+45.9°C  (low  = -273.1°C, high = +69.8°C)',
-        '+44.9°C',
-      ],
-    );
+    expect(sensors.map((e) => e.summary), [
+      '1.26 V',
+      '1.19 V  (min =  +0.00 V, max =  +1.74 V)',
+      '+45.9°C  (low  = -273.1°C, high = +69.8°C)',
+      '+44.9°C',
+    ]);
   });
 }