feat: bootstrap Spec Kit SDD workflow and TicketLab constitution

Add Spec Kit (cursor-agent), Constitution 1.0.1, Cursor skills/rules, and tooling docs so workshop agents follow Plane-backed SDD with versioned agent assets.

Co-authored-by: Cursor <cursoragent@cursor.com>

.specify/scripts/powershell/resolve-template.ps1

@@ -0,0 +1,38 @@
+#!/usr/bin/env pwsh
+
+param(
+    [Parameter(Position=0)]
+    [string]$TemplateName,
+    [switch]$Json,
+    [switch]$Help
+)
+
+$ErrorActionPreference = 'Stop'
+
+if ($Help) {
+    Write-Output "Usage: resolve-template.ps1 <template-name> [-Json]"
+    exit 0
+}
+
+if (-not $TemplateName) {
+    [Console]::Error.WriteLine("ERROR: Template name is required")
+    exit 1
+}
+
+. "$PSScriptRoot/common.ps1"
+
+$repoRoot = Get-RepoRoot
+$templateContent = Resolve-TemplateContent -TemplateName $TemplateName -RepoRoot $repoRoot
+if ($null -eq $templateContent) {
+    [Console]::Error.WriteLine("ERROR: Could not resolve required $TemplateName from the template override stack for $repoRoot")
+    exit 1
+}
+
+if ($Json) {
+    [PSCustomObject]@{
+        TEMPLATE_NAME = $TemplateName
+        TEMPLATE_CONTENT = $templateContent
+    } | ConvertTo-Json -Compress
+} else {
+    [Console]::Out.Write($templateContent)
+}