feat: add Lantstool links to near docs (#620)

Author: Riateche

pages/price-feeds/use-real-time-data/near.mdx

@@ -162,6 +162,8 @@ near contract \
     send
 ```
 
+**Try it out on [Lantstool](https://app.lantstool.dev/import/gh/lantstool/examples.near-protocol/main/integrations/pyth/real-time-price-data/update-price-feed.json)**
+
 Alternatively, you can use `near-js` libraries to perform the contract call. For this example we will create a simple node.js project.
 
 First, install the `near-js` libraries we will use:
@@ -272,6 +274,8 @@ near contract \
 
 ```
 
+**Try it out on [Lantstool](https://app.lantstool.dev/import/gh/lantstool/examples.near-protocol/main/integrations/pyth/real-time-price-data/get-price.json)**
+
 #### NEAR-JS Example
 
 For this example we will create a simple node.js project. First, install the [`near-js\client`](https://www.npmjs.com/package/@near-js/client) library: