feat: add repair command with cache rebuilds and system fixes

Add new 'mole repair' command with the following utilities:
- DNS cache flush (Repair-DnsCache)
- Font cache rebuild (Repair-FontCache) - requires admin
- Icon cache rebuild (Repair-IconCache) - restarts Explorer
- Windows Search index reset (Repair-SearchIndex) - requires admin
- Windows Store cache reset (Repair-StoreCache) - runs wsreset.exe

Features:
- Interactive menu when run without arguments
- Command-line flags: -DNS, -Font, -Icon, -Search, -Store, -All
- Dry-run mode support
- Proper service stop/start for font and search repairs

Usage:
  mole repair           # Interactive menu
  mole repair -DNS      # Flush DNS only
  mole repair -All      # Run all repairs

mole.ps1

@@ -62,6 +62,7 @@ function Show-MainHelp {
     Write-Host "    ${cyan}analyze${nc}     Visual disk space analyzer"
     Write-Host "    ${cyan}status${nc}      Real-time system monitor"
     Write-Host "    ${cyan}optimize${nc}    System optimization tasks"
+    Write-Host "    ${cyan}repair${nc}      Cache rebuilds and system fixes"
     Write-Host "    ${cyan}purge${nc}       Clean project build artifacts"
     Write-Host ""
     Write-Host "  ${green}OPTIONS:${nc}"
@@ -78,6 +79,8 @@ function Show-MainHelp {
     Write-Host "    ${gray}mole analyze${nc}          ${gray}# Disk analyzer${nc}"
     Write-Host "    ${gray}mole status${nc}           ${gray}# System monitor${nc}"
     Write-Host "    ${gray}mole optimize${nc}         ${gray}# Optimize system${nc}"
+    Write-Host "    ${gray}mole repair -DNS${nc}      ${gray}# Flush DNS cache${nc}"
+    Write-Host "    ${gray}mole repair -All${nc}      ${gray}# Run all repairs${nc}"
     Write-Host "    ${gray}mole purge${nc}            ${gray}# Clean dev artifacts${nc}"
     Write-Host ""
     Write-Host "  ${green}ENVIRONMENT:${nc}"
@@ -125,6 +128,12 @@ function Show-MainMenu {
             Command = "optimize"
             Icon = $script:Icons.Arrow
         }
+        @{
+            Name = "Repair"
+            Description = "Cache rebuilds & fixes"
+            Command = "repair"
+            Icon = $script:Icons.Admin
+        }
         @{
             Name = "Purge"
             Description = "Clean dev artifacts"