Add upload scripts for PowerShell and NodeJS.

bin/Upload-JMESPath.ps1

@@ -0,0 +1,72 @@
+#!/usr/bin/env pwsh
+[CmdletBinding()]
+param(
+	[Parameter(Position=0, HelpMessage='API base URL')]
+	[string]$ApiUrl,
+
+	[Parameter(HelpMessage='API key for authentication')]
+	[string]$ApiKey,
+
+	[Parameter(HelpMessage='Path to JSON file; default: read from stdin')]
+	[string]$JsonFile = '-',
+
+	[Parameter(HelpMessage='Show help')]
+	[switch]$Help
+)
+
+function Show-Usage {
+	$usage = @"
+Usage: Upload-JMESPath.ps1 [-ApiUrl <url>] [-ApiKey <key>] [-JsonFile <file>]
+
+Parameters:
+  -ApiUrl <url>        The base URL of the JMESPath Playground API (default: http://localhost:3000 or $env:JMESPATH_PLAYGROUND_API_URL)
+  -ApiKey <key>        The API key for authentication (can also be set via JMESPATH_PLAYGROUND_API_KEY)
+  -JsonFile <file>     The JSON file to upload (default: stdin if not specified)
+  -Help                Show this help message and exit
+"@
+	Write-Output $usage
+}
+
+if ($Help) { Show-Usage; exit 0 }
+
+# Apply environment defaults when parameters are not provided
+if (-not $ApiUrl) {
+	if ($env:JMESPATH_PLAYGROUND_API_URL) { $ApiUrl = $env:JMESPATH_PLAYGROUND_API_URL } else { $ApiUrl = 'http://localhost:3000' }
+}
+if (-not $ApiKey) {
+	$ApiKey = $env:JMESPATH_PLAYGROUND_API_KEY
+}
+
+# Read JSON body from file or stdin
+try {
+	if ($JsonFile -eq '-' -or [string]::IsNullOrEmpty($JsonFile)) {
+		$Body = [Console]::In.ReadToEnd()
+	} else {
+		if (-not (Test-Path -Path $JsonFile)) {
+			Write-Error "JSON file not found: $JsonFile"
+			exit 2
+		}
+		$Body = Get-Content -Raw -Path $JsonFile
+	}
+} catch {
+	Write-Error "Failed to read JSON input: $($_.Exception.Message)"
+	exit 2
+}
+
+# Prepare headers
+$Headers = @{ 'Accept' = 'application/json' }
+if (-not [string]::IsNullOrEmpty($ApiKey)) { $Headers['X-API-Key'] = $ApiKey }
+
+# POST to API
+$Uri = "$ApiUrl/api/v1/upload"
+try {
+	$response = Invoke-RestMethod -Uri $Uri -Method Post -Headers $Headers -ContentType 'application/json' -Body $Body -ErrorAction Stop
+	if ($null -ne $response) {
+		$response | ConvertTo-Json -Depth 10
+	} else {
+		Write-Output "Upload completed."
+	}
+} catch {
+	Write-Error "Upload failed: $($_.Exception.Message)"
+	exit 3
+}