Improve documentation clarity for vector, grid, and object fields

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

content/docs/fields/grid.mdx

@@ -192,26 +192,28 @@ import { GridCellRenderer } from '@object-ui/fields';
 
 ## Full Grid Functionality
 
-For advanced grid features, use the grid plugin:
+For advanced grid features, use the grid plugin (`@object-ui/plugin-grid`):
 
 ```typescript
 // Basic inline grid (simple display)
 { type: 'grid', name: 'items', columns: [...] }
 
-// Advanced grid (full CRUD)
+// Advanced grid with full features (requires plugin)
 {
   type: 'plugin:grid',
   bind: 'items',
   props: {
     columns: [...],
-    editable: true,
-    sortable: true,
-    filterable: true,
-    pagination: { pageSize: 20 }
+    editable: true,      // Plugin feature: inline editing
+    sortable: true,      // Plugin feature: column sorting
+    filterable: true,    // Plugin feature: filtering
+    pagination: { pageSize: 20 }  // Plugin feature: pagination
   }
 }
 ```
 
+**Note**: Features like `editable`, `sortable`, `filterable`, and advanced `pagination` are provided by the `@object-ui/plugin-grid` package, not the basic grid field.
+
 ## Use Cases
 
 - **Invoice/Order Line Items**: Product lines, services

content/docs/fields/object.mdx

@@ -183,8 +183,9 @@ import { ObjectCellRenderer } from '@object-ui/fields';
 
 ## Schema Validation
 
-For typed object fields, define a schema:
+For typed object fields, you can define a schema in two formats:
 
+**Simplified Format** (for documentation):
 ```typescript
 {
   type: 'object',
@@ -202,6 +203,30 @@ For typed object fields, define a schema:
 }
 ```
 
+**JSON Schema Format** (for validation):
+```typescript
+{
+  type: 'object',
+  name: 'product_specs',
+  label: 'Product Specifications',
+  schema: {
+    type: 'object',
+    properties: {
+      weight: { type: 'number' },
+      dimensions: {
+        type: 'object',
+        properties: {
+          width: { type: 'number' },
+          height: { type: 'number' },
+          depth: { type: 'number' }
+        }
+      },
+      materials: { type: 'array' }
+    }
+  }
+}
+```
+
 ## Use Cases
 
 - **Configuration**: Application settings, API configurations

content/docs/fields/vector.mdx

@@ -67,8 +67,9 @@ Shows:
 
 Different AI models use different embedding sizes:
 
-- **OpenAI text-embedding-3-small**: 1536 dimensions
-- **OpenAI text-embedding-ada-002**: 1536 dimensions  
+- **OpenAI text-embedding-3-small**: 512, 1536, or 3072 dimensions (configurable)
+- **OpenAI text-embedding-3-large**: 256, 1024, or 3072 dimensions (configurable)
+- **OpenAI text-embedding-ada-002**: 1536 dimensions (fixed)
 - **Sentence Transformers (BERT)**: 768 dimensions
 - **OpenAI CLIP**: 512 dimensions
 - **Word2Vec**: 100-300 dimensions