docs: add page builder exploration documentation

BUILDER_EXPLORATION.md

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+# Page Builder Exploration
+
+Beyond the core cube scene, I explored several advanced features of the **Page Builder** environment by building more complex layouts.
+
+These projects are in the builder **exclusive\_scarlet\_tilda** under **Divya's Team** in **new pages**.
+
+##  Experimental Layouts
+
+### Experiment 1: 3D Sphere & UI Integration
+This scene demonstrates integration between traditional UI elements (Flex and Text) and 3D Canvas elements exploring the builder's lighting and material capabilities.
+
+![Builder Exploration](./assets/builder_exploration.png)
+
+####  Key Components Used
+- **Flex & Text**: Implemented a responsive text-based header ("The Invocation — Behold the sign and the...").
+- **RadioGroup**: Added for UI-based control/selection.
+- **Canvas & Meshes**:
+  - Used `sphereGeometry` instead of a box.
+  - Applied `meshPhongMaterial` for different lighting properties (shining/specular highlights).
+- **Advanced Lighting**: Used both a `PointLight` and a `DirectionalLight` to create more complex shadows and highlights on the sphere.
+- **OrbitControls**: Enabled interactive camera movement in the 3D space.
+
+### Experiment 2: Complex UI & Tabs
+A more complex UI structure focusing on structural components and tabbed layouts.
+
+![Builder New Page](./assets/builder_new_page.png)
+
+####  Key Components Used
+- **Hierarchical Flex Layouts**: Nested multiple `Flex` containers to create a structured sidebar and content area.
+- **Tabs System**: Implemented a full `Tabs` component including `TabsList`, `TabsTrigger`, and `TabsContent` for categories like "Fabrics" and "Jacket".
+- **Form Elements**: Integrated `RadioGroup` and `RadioGroupItem` inside the tab content for user selections.
+- **Visual Assets**: Included `Image` and `Text` blocks for a data-driven layout.
+
+##  Insights from the Experiment
+
+These tests helped me understand how the builder handles:
+- **Mixing UI & 3D**: Placing non-3D components (like `Flex`) alongside a 3D `Canvas`.
+- **Complex UI Logic**: Utilizing `Tabs` to organize information in a clear, interactive way.
+- **Phong Shading**: Observing how `meshPhongMaterial` reacts differently than the `meshStandardMaterial` used in the cube project.
+- **Layer Organization**: Managing a more complex hierarchy with multiple nested components across the UI and 3D layers.