feat(scaffold): Next 16 + Payload 3 scaffold with Kaniko CI and Swarm deploy

Initial app scaffold wired end-to-end: Payload 3.82 CMS integrated with Next
16.2 App Router (standalone output), PostgreSQL 17 adapter, Lexical rich text,
Tailwind 3 with Material 3 token palette ported from the stitch technical-
editorial design, self-hosted Space Grotesk + Inter via next/font, and
lucide-react icons. Admin lives at /admin, REST/GraphQL at /api/*, and
/api/health returns build SHA/REV for deploy verification.

Seven collections (Users, Media, Categories, Projects, Posts, Gear,
ContactSubmissions) and six globals (Home, About, Contact, Resume,
Navigation, SEO) model the content outlined in docs/PRD.md.

Multi-stage Dockerfile builds a non-root standalone runner; Woodpecker
pipeline lints, typechecks, builds, audits, builds with Kaniko to
git.mosaicstack.dev, scans with Trivy, and links the package. Swarm
compose mirrors the mosaic-stack-website Traefik entrypoints=web pattern
with www->apex redirect and immutable WEB_IMAGE_TAG.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/collections/Gear.ts

@@ -0,0 +1,36 @@
+import type { CollectionConfig } from "payload";
+
+export const Gear: CollectionConfig = {
+  slug: "gear",
+  access: { read: () => true },
+  admin: {
+    useAsTitle: "name",
+    defaultColumns: ["name", "type"],
+    description: "Music / maker gear — decorative only for v0.0.x",
+  },
+  fields: [
+    { name: "name", type: "text", required: true },
+    {
+      name: "type",
+      type: "select",
+      options: [
+        { label: "Daily driver", value: "daily-driver" },
+        { label: "Interface", value: "interface" },
+        { label: "Monitor", value: "monitor" },
+        { label: "Workbench", value: "workbench" },
+      ],
+    },
+    { name: "notes", type: "textarea" },
+    { name: "image", type: "upload", relationTo: "media" },
+    {
+      name: "accent",
+      type: "select",
+      defaultValue: "tertiary",
+      options: [
+        { label: "Primary", value: "primary" },
+        { label: "Secondary", value: "secondary" },
+        { label: "Tertiary", value: "tertiary" },
+      ],
+    },
+  ],
+};