chore: scaffold gallery repo with placeholder workflows

Author: crisdosaygo

.github/workflows/build-gallery-index.yml

@@ -0,0 +1,16 @@
+name: Build Gallery Index
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main ]
+    paths:
+      - 'gallery/**'
+
+jobs:
+  build-index:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Placeholder
+        run: echo "Index builder workflow scaffolded"

.github/workflows/gallery-validate.yml

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+name: Gallery Validate
+
+on:
+  pull_request:
+    paths:
+      - 'gallery/**'
+      - '.github/workflows/gallery-validate.yml'
+  push:
+    branches: [ main ]
+    paths:
+      - 'gallery/**'
+      - '.github/workflows/gallery-validate.yml'
+
+jobs:
+  validate-gallery:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Placeholder
+        run: echo "Gallery validation workflow scaffolded"

README.md

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+# Tree Gallery
+
+Public gallery repository for Tree collection scripts.
+
+Status: scaffold initialized.