refactor(editor): rename block-std to std (#11250)

Closes: BS-2946

blocksuite/docs/api/@blocksuite/std/gfx/functions/observe.md

@@ -0,0 +1,53 @@
+[**BlockSuite API Documentation**](../../../../README.md)
+
+***
+
+[BlockSuite API Documentation](../../../../README.md) / [@blocksuite/std](../../README.md) / [gfx](../README.md) / observe
+
+# Function: observe()
+
+> **observe**\<`V`, `E`, `T`\>(`fn`): (`_`, `context`) => `ClassAccessorDecoratorResult`\<`GfxPrimitiveElementModel`\<`BaseElementProps`\>, `V`\>
+
+A decorator to observe the y type property.
+You can think of it is just a decorator version of 'observe' method of Y.Array and Y.Map.
+
+The observer function start to observe the property when the model is mounted. And it will
+re-observe the property automatically when the value is altered.
+
+## Type Parameters
+
+### V
+
+`V`
+
+### E
+
+`E` *extends* `YEvent`\<`any`\>
+
+### T
+
+`T` *extends* `GfxPrimitiveElementModel`\<`BaseElementProps`\>
+
+## Parameters
+
+### fn
+
+`ObserveFn`\<`E`, `T`\>
+
+## Returns
+
+`Function`
+
+### Parameters
+
+#### \_
+
+`unknown`
+
+#### context
+
+`ClassAccessorDecoratorContext`
+
+### Returns
+
+`ClassAccessorDecoratorResult`\<`GfxPrimitiveElementModel`\<`BaseElementProps`\>, `V`\>