feat: bootstrap vela UI and gateway workspace

Establish the monorepo, tooling, and starter apps so UI and gateway development can begin from a documented, runnable baseline.

package.json

@@ -0,0 +1,16 @@
+{
+  "name": "vela",
+  "private": true,
+  "packageManager": "yarn@1.22.22",
+  "workspaces": [
+    "apps/*"
+  ],
+  "scripts": {
+    "install:all": "yarn install",
+    "dev:ui": "yarn workspace vela-ui dev",
+    "dev:gateway": "yarn workspace vela-gateway dev",
+    "build:ui": "yarn workspace vela-ui build",
+    "build:gateway": "yarn workspace vela-gateway build",
+    "check:ui": "yarn workspace vela-ui check"
+  }
+}