docs: document float property (for v2.1.2) (#10575)

www/apps/book/app/learn/fundamentals/data-models/property-types/page.mdx

@@ -69,10 +69,49 @@ export default MyCustom
 
 ---
 
+## float
+
+<Note>
+
+This property is only available after [Medusa v2.1.2](https://github.com/medusajs/medusa/releases/tag/v2.1.2).
+
+</Note>
+
+The `float` method defines a number property that allows for values with decimal places.
+
+<Note title="Tip">
+
+Use this property type when it's less important to have high precision for numbers with large decimal places. Alternatively, for higher percision, use the [bigNumber property](#bignumber).
+
+</Note>
+
+For example:
+
+export const floatHighlights = [["4", "float", "Define a `float` property."]]
+
+```ts highlights={floatHighlights}
+import { model } from "@medusajs/framework/utils"
+
+const MyCustom = model.define("my_custom", {
+  rating: model.float(),
+  // ...
+})
+
+export default MyCustom
+```
+
+---
+
 ## bigNumber
 
 The `bigNumber` method defines a number property that expects large numbers, such as prices.
 
+<Note title="Tip">
+
+Use this property type when it's important to have high precision for numbers with large decimal places. Alternatively, for less percision, use the [float property](#float).
+
+</Note>
+
 For example:
 
 export const bigNumberHighlights = [["4", "bigNumber", "Define a `bigNumber` property."]]