chore: add pre-commit config and fix trailing whitespace/end-of-file (#3430)

issues

scripts/powershell/check-prerequisites.ps1

@@ -42,10 +42,10 @@ OPTIONS:
 EXAMPLES:
   # Check task prerequisites (plan.md required)
   .\check-prerequisites.ps1 -Json
-  
+
   # Check implementation prerequisites (plan.md + tasks.md required)
   .\check-prerequisites.ps1 -Json -RequireTasks -IncludeTasks
-  
+
   # Get feature paths only (no validation)
   .\check-prerequisites.ps1 -PathsOnly
 
@@ -118,35 +118,35 @@ if (Test-Path $paths.RESEARCH) { $docs += 'research.md' }
 if (Test-Path $paths.DATA_MODEL) { $docs += 'data-model.md' }
 
 # Check contracts directory (only if it exists and has files)
-if ((Test-Path $paths.CONTRACTS_DIR) -and (Get-ChildItem -Path $paths.CONTRACTS_DIR -ErrorAction SilentlyContinue | Select-Object -First 1)) { 
-    $docs += 'contracts/' 
+if ((Test-Path $paths.CONTRACTS_DIR) -and (Get-ChildItem -Path $paths.CONTRACTS_DIR -ErrorAction SilentlyContinue | Select-Object -First 1)) {
+    $docs += 'contracts/'
 }
 
 if (Test-Path $paths.QUICKSTART) { $docs += 'quickstart.md' }
 
 # Include tasks.md if requested and it exists
-if ($IncludeTasks -and (Test-Path $paths.TASKS)) { 
-    $docs += 'tasks.md' 
+if ($IncludeTasks -and (Test-Path $paths.TASKS)) {
+    $docs += 'tasks.md'
 }
 
 # Output results
 if ($Json) {
     # JSON output
-    [PSCustomObject]@{ 
+    [PSCustomObject]@{
         FEATURE_DIR = $paths.FEATURE_DIR
-        AVAILABLE_DOCS = $docs 
+        AVAILABLE_DOCS = $docs
     } | ConvertTo-Json -Compress
 } else {
     # Text output
     Write-Output "FEATURE_DIR:$($paths.FEATURE_DIR)"
     Write-Output "AVAILABLE_DOCS:"
-    
+
     # Show status of each potential document
     Test-FileExists -Path $paths.RESEARCH -Description 'research.md' | Out-Null
     Test-FileExists -Path $paths.DATA_MODEL -Description 'data-model.md' | Out-Null
     Test-DirHasFiles -Path $paths.CONTRACTS_DIR -Description 'contracts/' | Out-Null
     Test-FileExists -Path $paths.QUICKSTART -Description 'quickstart.md' | Out-Null
-    
+
     if ($IncludeTasks) {
         Test-FileExists -Path $paths.TASKS -Description 'tasks.md' | Out-Null
     }

scripts/powershell/common.ps1

@@ -191,7 +191,7 @@ function Get-FeaturePathsEnv {
         [Console]::Error.WriteLine("ERROR: Feature directory not found. Set SPECIFY_FEATURE_DIRECTORY or run the specify command to create .specify/feature.json.")
         exit 1
     }
-    
+
     # When no branch context exists (no SPECIFY_FEATURE, feature resolved via
     # SPECIFY_FEATURE_DIRECTORY or feature.json), fall back to the feature
     # directory basename so CURRENT_BRANCH is a usable identifier rather than

scripts/powershell/setup-plan.ps1

@@ -63,7 +63,7 @@ if (Test-Path $paths.IMPL_PLAN -PathType Leaf) {
 
 # Output results
 if ($Json) {
-    $result = [PSCustomObject]@{ 
+    $result = [PSCustomObject]@{
         FEATURE_SPEC = $paths.FEATURE_SPEC
         IMPL_PLAN = $paths.IMPL_PLAN
         SPECS_DIR = $paths.FEATURE_DIR