Adds Powershell scripts to tools.

tools/powershell/Deploy-Plugin.ps1

@@ -0,0 +1,49 @@
+#!/usr/bin/env pwsh
+
+# Set strict mode for better error handling
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+# Check required environment variable
+if (-not $env:MINECRAFT_SERVER_PATH) {
+    Write-Error "Error: MINECRAFT_SERVER_PATH environment variable is not set."
+    exit 1
+}
+
+# Find project root (two directories above this script)
+$ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
+$ProjectRoot = Split-Path -Parent (Split-Path -Parent $ScriptDir)
+
+# Find the most recent plugin jar file
+$LibsPath = Join-Path $ProjectRoot "build\libs"
+$PluginJar = Get-ChildItem -Path "$LibsPath\*.jar" -ErrorAction SilentlyContinue | 
+    Sort-Object LastWriteTime -Descending | 
+    Select-Object -First 1
+
+if (-not $PluginJar) {
+    Write-Error "Error: No plugin jar found in $LibsPath. Build the plugin first."
+    exit 1
+}
+
+# Optional: Warn if jar is older than any source file
+$SourcePaths = @(
+    (Join-Path $ProjectRoot "src\main\java"),
+    (Join-Path $ProjectRoot "src\main\resources")
+)
+
+$NewerSourceFiles = Get-ChildItem -Path $SourcePaths -Recurse -File -ErrorAction SilentlyContinue | 
+    Where-Object { $_.LastWriteTime -gt $PluginJar.LastWriteTime }
+
+if ($NewerSourceFiles) {
+    Write-Host "Warning: The built plugin jar is older than some source files. Consider rebuilding." -ForegroundColor Yellow
+}
+
+# Create plugins directory if it doesn't exist
+$PluginsPath = Join-Path $env:MINECRAFT_SERVER_PATH "plugins"
+if (-not (Test-Path $PluginsPath)) {
+    New-Item -ItemType Directory -Path $PluginsPath -Force | Out-Null
+}
+
+# Copy the plugin jar to the plugins directory
+Copy-Item -Path $PluginJar.FullName -Destination $PluginsPath -Force
+Write-Host "Deployed $($PluginJar.Name) to $PluginsPath\"