docs: Add wxt init demo GIF (#974)

Co-authored-by: Aaron <aaronklinker1@gmail.com>
Co-authored-by: okineadev <okineadev@users.noreply.github.com>

.github/actions/setup/action.yml

@@ -1,5 +1,9 @@
 name: Basic Setup
 description: Install PNPM, Node, and dependencies
+inputs:
+  install:
+    default: 'true'
+    description: Whether or not to run 'pnpm install'
 runs:
   using: composite
   steps:
@@ -11,5 +15,6 @@ runs:
         node-version: 18
         cache: pnpm
     - name: Install Dependencies
+      if: ${{ inputs.install == 'true' }}
       shell: bash
       run: pnpm install