feat: Refactor service management scripts to use a unified dev script

- Added package.json to manage development scripts.
- Updated restart-services.ps1 to call the new dev script for starting services.
- Refactored start-admin.ps1, start-backend.ps1, start-frontend.ps1, and start-mcp.ps1 to utilize the dev script for starting respective services.
- Enhanced stop-services.ps1 to improve process termination logic by matching command patterns.

stop-services.ps1

@@ -16,23 +16,24 @@ if (@($FrontendOnly, $BackendOnly, $AdminOnly, $McpOnly).Where({ $_ }).Count -gt
 
 function Stop-RepoShells {
   param(
-    [string]$ScriptName
+    [string[]]$CommandPatterns
   )
 
   $shells = Get-CimInstance Win32_Process | Where-Object {
+    $commandLine = $_.CommandLine
     ($_.Name -in @("powershell.exe", "pwsh.exe")) -and
     $_.CommandLine -and
-    $_.CommandLine.Contains($repoRoot) -and
-    $_.CommandLine.Contains($ScriptName)
+    $commandLine.Contains($repoRoot) -and
+    ($CommandPatterns | Where-Object { $commandLine.Contains($_) }).Count -gt 0
   }
 
   foreach ($shell in $shells) {
     try {
       Stop-Process -Id $shell.ProcessId -Force -ErrorAction Stop
-      Write-Host "[stop] Closed shell for $ScriptName (PID $($shell.ProcessId))." -ForegroundColor Yellow
+      Write-Host "[stop] Closed matching shell (PID $($shell.ProcessId))." -ForegroundColor Yellow
     }
     catch {
-      Write-Warning "[stop] Failed to close shell for $ScriptName (PID $($shell.ProcessId)): $($_.Exception.Message)"
+      Write-Warning "[stop] Failed to close matching shell (PID $($shell.ProcessId)): $($_.Exception.Message)"
     }
   }
 }
@@ -67,22 +68,22 @@ function Stop-PortOwner {
 }
 
 function Stop-Frontend {
-  Stop-RepoShells -ScriptName "start-frontend.ps1"
+  Stop-RepoShells -CommandPatterns @("start-frontend.ps1", "dev.ps1", "-Only frontend")
   Stop-PortOwner -Port 4321 -Label "frontend"
 }
 
 function Stop-Backend {
-  Stop-RepoShells -ScriptName "start-backend.ps1"
+  Stop-RepoShells -CommandPatterns @("start-backend.ps1", "dev.ps1", "-Only backend")
   Stop-PortOwner -Port 5150 -Label "backend"
 }
 
 function Stop-Admin {
-  Stop-RepoShells -ScriptName "start-admin.ps1"
+  Stop-RepoShells -CommandPatterns @("start-admin.ps1", "dev.ps1", "-Only admin")
   Stop-PortOwner -Port 4322 -Label "admin"
 }
 
 function Stop-Mcp {
-  Stop-RepoShells -ScriptName "start-mcp.ps1"
+  Stop-RepoShells -CommandPatterns @("start-mcp.ps1", "dev.ps1", "-Only mcp")
   Stop-PortOwner -Port 5151 -Label "MCP"
 }